JavaScript實(shí)用功能代碼片段 1、原生JavaScript實(shí)現(xiàn)字符串長度截取1 function cutstr(str, len) {2 var temp;3 var icount = 0;4 var patrn = /[^\x00-\xff]/;5 var strre = "";6 for (var i = 0; i < str.length; i++) {7 if (icount < len - 1) {8 temp = str.substr(i, 1);9 if (patrn.exec(temp) == null) { 10 icount = icount + 1 11 } else { 12 icount = icount + 2 13 } 14 strre += temp 15 } else { 16 break 17 } 18 } 19 return strre + "..." 20 }2、原生JavaScript獲取域名主機(jī)1 function getHost(url) {2 var host = "null";3 if(typeof url == "undefined"|| null == url) {4 url = window.location.href;5 }6 var regex = /^\w+\:\/\/([^\/]*).*/;7 var match = url.match(regex);8 if(typeof match != "undefined" && null != match) {9 host = match[1]; 10 } 11 return host; 12 }3、原生JavaScript清除空格1 String.prototype.trim = function() { 2 var reExtraSpace = /^\s*(.*?)\s+$/; 3 return this.replace(reExtraSpace, "$1") 4 }4、原生JavaScript替換全部1 String.prototype.replaceAll = function(s1, s2) { 2 return this.replace(new RegExp(s1, "gm"), s2) 3 }5、原生JavaScript轉(zhuǎn)義html標(biāo)簽1 function HtmlEncode(text) { 2 return text.replace(/&/g, '&amp').replace(/\"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g, '&gt;') 3 }6、原生JavaScript還原h(huán)tml標(biāo)簽1 function HtmlDecode(text) { 2 return text.replace(/&amp;/g, '&').replace(/&quot;/g, '\"').replace(/&lt;/g, '<').replace(/&gt;/g, '>') 3 }7、原生JavaScript時(shí)間日期格式轉(zhuǎn)換1 Date.prototype.Format = function(formatStr) {2 var str = formatStr;3 var Week = ['日', '一', '二', '三', '四', '五', '六'];4 str = str.replace(/yyyy|YYYY/, this.getFullYear());5 str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() % 100));6 str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : '0' + (this.getMonth() + 1));7 str = str.replace(/M/g, (this.getMonth() + 1));8 str = str.replace(/w|W/g, Week[this.getDay()]);9 str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate()); 10 str = str.replace(/d|D/g, this.getDate()); 11 str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours()); 12 str = str.replace(/h|H/g, this.getHours()); 13 str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes()); 14 str = str.replace(/m/g, this.getMinutes()); 15 str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds()); 16 str = str.replace(/s|S/g, this.getSeconds()); 17 return str 18 }8、原生JavaScript判斷是否為數(shù)字類型1 function isDigit(value) { 2 var patrn = /^[0-9]*$/; 3 if (patrn.exec(value) == null || value == "") { 4 return false 5 } else { 6 return true 7 } 8 }9、原生JavaScript設(shè)置cookie值1 function setCookie(name, value, Hours) { 2 var d = new Date(); 3 var offset = 8; 4 var utc = d.getTime() + (d.getTimezoneOffset() * 60000); 5 var nd = utc + (3600000 * offset); 6 var exp = new Date(nd); 7 exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000); 8 document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;" 9 }10、原生JavaScript獲取cookie值1 function getCookie(name) { 2 var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)")); 3 if (arr != null) return unescape(arr[2]); 4 return null 5 }11、原生JavaScript加入收藏夾1 function AddFavorite(sURL, sTitle) {2 try {3 window.external.addFavorite(sURL, sTitle)4 } catch(e) {5 try {6 window.sidebar.addPanel(sTitle, sURL, "")7 } catch(e) {8 alert("加入收藏失敗，請使用Ctrl+D進(jìn)行添加")9 } 10 } 11 }12、原生JavaScript設(shè)為首頁1 function setHomepage() {2 if (document.all) {3 document.body.style.behavior = 'url(#default#homepage)';4 document.body.setHomePage('http://www.jqueryschool') //http:jq-school.com/5 } else if (window.sidebar) {6 if (window.netscape) {7 try {8 netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect")9 } catch(e) { 10 alert("該操作被瀏覽器拒絕，如果想啟用該功能，請?jiān)诘刂窓趦?nèi)輸入 about:config,然后將項(xiàng) signed.applets.codebase_principal_support 值該為true") 11 } 12 } 13 var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch); 14 prefs.setCharPref('browser.startup.homepage', 'http://www.jqueryschool') //http:jq-school.com/
15 }
16 }
13、原生JavaScript判斷IE61 var ua = navigator.userAgent.toLowerCase(); 2 var isIE6 = ua.indexOf("msie 6") > -1; 3 if (isIE6) { 4 try { 5 document.execCommand("BackgroundImageCache", false, true) 6 } catch(e) {} 7 }14、原生JavaScript加載樣式文件1 function LoadStyle(url) {2 try {3 document.createStyleSheet(url)4 } catch(e) {5 var cssLink = document.createElement('link');6 cssLink.rel = 'stylesheet';7 cssLink.type = 'text/css';8 cssLink.href = url;9 var head = document.getElementsByTagName('head')[0]; 10 head.appendChild(cssLink) 11 } 12 }15、原生JavaScript返回腳本內(nèi)容1 function evalscript(s) {2 if(s.indexOf('<script') == -1) return s;3 var p = /<script[^\>]*?>([^\x00]*?)<\/script>/ig;4 var arr = [];5 while(arr = p.exec(s)) {6 var p1 = /<script[^\>]*?src=\"([^\>]*?)\"[^\>]*?(reload=\"1\")?(?:charset=\"([\w\-]+?)\")?><\/script>/i;7 var arr1 = [];8 arr1 = p1.exec(arr[0]);9 if(arr1) { 10 appendscript(arr1[1], '', arr1[2], arr1[3]); 11 } else { 12 p1 = /<script(.*?)>([^\x00]+?)<\/script>/i; 13 arr1 = p1.exec(arr[0]); 14 appendscript('', arr1[2], arr1[1].indexOf('reload=') != -1); 15 } 16 } 17 return s; 18 }16、原生JavaScript清除腳本內(nèi)容1 function stripscript(s) { 2 return s.replace(/<script.*?>.*?<\/script>/ig, ''); 3 }17、原生JavaScript動態(tài)加載腳本文件1 function appendscript(src, text, reload, charset) {2 var id = hash(src + text);3 if(!reload && in_array(id, evalscripts)) return;4 if(reload && $(id)) {5 $(id).parentNode.removeChild($(id));6 }7 8 evalscripts.push(id);9 var scriptNode = document.createElement("script"); 10 scriptNode.type = "text/javascript"; 11 scriptNode.id = id; 12 scriptNode.charset = charset ? charset : (BROWSER.firefox ? document.characterSet : document.charset); 13 try { 14 if(src) { 15 scriptNode.src = src; 16 scriptNode.onloadDone = false; 17 scriptNode.onload = function () { 18 scriptNode.onloadDone = true; 19 JSLOADED[src] = 1; 20 }; 21 scriptNode.onreadystatechange = function () { 22 if((scriptNode.readyState == 'loaded' || scriptNode.readyState == 'complete') && !scriptNode.onloadDone) { 23 scriptNode.onloadDone = true; 24 JSLOADED[src] = 1; 25 } 26 }; 27 } else if(text){ 28 scriptNode.text = text; 29 } 30 document.getElementsByTagName('head')[0].appendChild(scriptNode); 31 } catch(e) {} 32 }18、原生JavaScript返回按ID檢索的元素對象1 function $(id) { 2 return !id ? null : document.getElementById(id); 3 }19、原生JavaScript返回瀏覽器版本內(nèi)容1 function browserVersion(types) {2 var other = 1;3 for(i in types) {4 var v = types[i] ? types[i] : i;5 if(USERAGENT.indexOf(v) != -1) {6 var re = new RegExp(v + '(\\/|\\s)([\\d\\.]+)', 'ig');7 var matches = re.exec(USERAGENT);8 var ver = matches != null ? matches[2] : 0;9 other = ver !== 0 && v != 'mozilla' ? 0 : other; 10 }else { 11 var ver = 0; 12 } 13 eval('BROWSER.' + i + '= ver'); 14 } 15 BROWSER.other = other; 16 }20、原生JavaScript元素顯示的通用方法1 function $(id) {2 return !id ? null : document.getElementById(id);3 }4 function display(id) {5 var obj = $(id);6 if(obj.style.visibility) {7 obj.style.visibility = obj.style.visibility == 'visible' ? 'hidden' : 'visible';8 } else {9 obj.style.display = obj.style.display == '' ? 'none' : ''; 10 } 11 }21、原生JavaScript中有insertBefore方法,可惜卻沒有insertAfter方法?用如下函數(shù)實(shí)現(xiàn)1 function insertAfter(newChild,refChild){ 2 var parElem=refChild.parentNode; 3 if(parElem.lastChild==refChild){ 4 refChild.appendChild(newChild); 5 }else{ 6 parElem.insertBefore(newChild,refChild.nextSibling); 7 } 8 }22、原生JavaScript中兼容瀏覽器綁定元素事件1 function addEventSamp(obj,evt,fn){ 2 if (obj.addEventListener) { 3 obj.addEventListener(evt, fn, false); 4 }else if(obj.attachEvent){ 5 obj.attachEvent('on'+evt,fn); 6 } 7 } 23、原生JavaScript光標(biāo)停在文字的后面，文本框獲得焦點(diǎn)時(shí)調(diào)用1 function focusLast(){ 2 var e = event.srcElement; 3 var r =e.createTextRange(); 4 r.moveStart('character',e.value.length); 5 r.collapse(true); 6 r.select(); 7 }24、原生JavaScript檢驗(yàn)URL鏈接是否有效1 function getUrlState(URL){ 2 var xmlhttp = new ActiveXObject("microsoft.xmlhttp"); 3 xmlhttp.Open("GET",URL, false); 4 try{ 5 xmlhttp.Send(); 6 }catch(e){7 }finally{ 8 var result = xmlhttp.responseText; 9 if(result){ 10 if(xmlhttp.Status==200){ 11 return(true); 12 }else{ 13 return(false); 14 } 15 }else{ 16 return(false); 17 } 18 } 19 }25、原生JavaScript格式化CSS樣式代碼1 function formatCss(s){//格式化代碼 2 s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1"); 3 s = s.replace(/;\s*;/g, ";"); //清除連續(xù)分號 4 s = s.replace(/\,[\s\.\#\d]*{/g, "{"); 5 s = s.replace(/([^\s])\{([^\s])/g, "$1 {\n\t$2"); 6 s = s.replace(/([^\s])\}([^\n]*)/g, "$1\n}\n$2"); 7 s = s.replace(/([^\s]);([^\s\}])/g, "$1;\n\t$2"); 8 return s; 9 }26、原生JavaScript壓縮CSS樣式代碼1 function yasuoCss (s) {//壓縮代碼 2 s = s.replace(/\/\*(.|\n)*?\*\//g, ""); //刪除注釋 3 s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1"); 4 s = s.replace(/\,[\s\.\#\d]*\{/g, "{"); //容錯(cuò)處理 5 s = s.replace(/;\s*;/g, ";"); //清除連續(xù)分號 6 s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白 7 return (s == null) ? "" : s[1]; 8 }27、原生JavaScript獲取當(dāng)前路徑1 var currentPageUrl = ""; 2 if (typeof this.href === "undefined") { 3 currentPageUrl = document.location.toString().toLowerCase(); 4 } 5 else { 6 currentPageUrl = this.href.toString().toLowerCase(); 7 }28、原生JavaScriptIP轉(zhuǎn)成整型1 function _ip2int(ip){ 2 var num = 0; 3 ip = ip.split("."); 4 num = Number(ip[0]) * 256 * 256 * 256 + Number(ip[1]) * 256 * 256 + Number(ip[2]) * 256 + Number(ip[3]); 5 num = num >>> 0; 6 return num; 7 }29、原生JavaScript整型解析為IP地址1 function _int2iP(num){2 var str;3 var tt = new Array();4 tt[0] = (num >>> 24) >>> 0;5 tt[1] = ((num << 8) >>> 24) >>> 0;6 tt[2] = (num << 16) >>> 24;7 tt[3] = (num << 24) >>> 24;8 str = String(tt[0]) + "." + String(tt[1]) + "." + String(tt[2]) + "." + String(tt[3]);9 return str; 10 }30、原生JavaScript實(shí)現(xiàn)checkbox全選與全不選1 function checkAll() {2 var selectall = document.getElementById("selectall");3 var allbox = document.getElementsByName("allbox");4 if (selectall.checked) {5 for (var i = 0; i < allbox.length; i++) {6 allbox[i].checked = true;7 }8 } else {9 for (var i = 0; i < allbox.length; i++) { 10 allbox[i].checked = false; 11 } 12 } 13 }31、原生JavaScript判斷是否移動設(shè)備1 function isMobile(){2 if (typeof this._isMobile === 'boolean'){3 return this._isMobile;4 }5 var screenWidth = this.getScreenWidth();6 var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;7 var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");8 if(!fixViewPortsExperiment){9 if(!this.isAppleMobileDevice()){ 10 screenWidth = screenWidth/window.devicePixelRatio; 11 } 12 } 13 var isMobileScreenSize = screenWidth < 600; 14 var isMobileUserAgent = false; 15 this._isMobile = isMobileScreenSize && this.isTouchScreen(); 16 return this._isMobile; 17 }32、原生JavaScript判斷是否移動設(shè)備訪問1 function isMobileUserAgent(){ 2 return (/iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test(window.navigator.userAgent.toLowerCase())); 3 }33、原生JavaScript判斷是否蘋果移動設(shè)備訪問1 function isAppleMobileDevice(){ 2 return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase())); 3 }34、原生JavaScript判斷是否安卓移動設(shè)備訪問1 function isAndroidMobileDevice(){ 2 return (/android/i.test(navigator.userAgent.toLowerCase())); 3 }35、原生JavaScript判斷是否Touch屏幕1 function isTouchScreen(){ 2 return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch); 3 }36、原生JavaScript判斷是否在安卓上的谷歌瀏覽器1 function isNewChromeOnAndroid(){2 if(this.isAndroidMobileDevice()){3 var userAgent = navigator.userAgent.toLowerCase();4 if((/chrome/i.test(userAgent))){5 var parts = userAgent.split('chrome/');6 7 var fullVersionString = parts[1].split(" ")[0];8 var versionString = fullVersionString.split('.')[0];9 var version = parseInt(versionString); 10 11 if(version >= 27){ 12 return true; 13 } 14 } 15 } 16 return false; 17 }37、原生JavaScript判斷是否打開視窗1 function isViewportOpen() { 2 return !!document.getElementById('wixMobileViewport'); 3 }38、原生JavaScript獲取移動設(shè)備初始化大小1 function getInitZoom(){2 if(!this._initZoom){3 var screenWidth = Math.min(screen.height, screen.width);4 if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){5 screenWidth = screenWidth/window.devicePixelRatio;6 }7 this._initZoom = screenWidth /document.body.offsetWidth;8 }9 return this._initZoom; 10 }39、原生JavaScript獲取移動設(shè)備最大化大小1 function getZoom(){2 var screenWidth = (Math.abs(window.orientation) === 90) ? Math.max(screen.height, screen.width) : Math.min(screen.height, screen.width);3 if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){4 screenWidth = screenWidth/window.devicePixelRatio;5 }6 var FixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;7 var FixViewPortsExperimentRunning = FixViewPortsExperiment && (FixViewPortsExperiment === "New" || FixViewPortsExperiment === "new");8 if(FixViewPortsExperimentRunning){9 return screenWidth / window.innerWidth; 10 }else{ 11 return screenWidth / document.body.offsetWidth; 12 } 13 }40、原生JavaScript獲取移動設(shè)備屏幕寬度1 function getScreenWidth(){2 var smallerSide = Math.min(screen.width, screen.height);3 var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport;4 var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new");5 if(fixViewPortsExperiment){6 if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){7 smallerSide = smallerSide/window.devicePixelRatio;8 }9 } 10 return smallerSide; 11 }41、原生JavaScript完美判斷是否為網(wǎng)址1 function IsURL(strUrl) { 2 var regular = /^\b(((https?|ftp):\/\/)?[-a-z0-9]+(\.[-a-z0-9]+)*\.(?:com|edu|gov|int|mil|net|org|biz|info|name|museum|asia|coop|aero|[a-z][a-z]|((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]\d)|\d))\b(\/[-a-z0-9_:\@&?=+,.!\/~%\$]*)?)$/i 3 if (regular.test(strUrl)) { 4 return true; 5 } 6 else { 7 return false; 8 } 9 }42、原生JavaScript根據(jù)樣式名稱檢索元素對象1 function getElementsByClassName(name) {2 var tags = document.getElementsByTagName('*') || document.all;3 var els = [];4 for (var i = 0; i < tags.length; i++) {5 if (tags[i].className) {6 var cs = tags[i].className.split(' ');7 for (var j = 0; j < cs.length; j++) {8 if (name == cs[j]) {9 els.push(tags[i]); 10 break 11 } 12 } 13 } 14 } 15 return els 16 }43、原生JavaScript判斷是否以某個(gè)字符串開頭1 String.prototype.startWith = function (s) { 2 return this.indexOf(s) == 0 3 }44、原生JavaScript判斷是否以某個(gè)字符串結(jié)束1 String.prototype.endWith = function (s) { 2 var d = this.length - s.length; 3 return (d >= 0 && this.lastIndexOf(s) == d) 4 }45、原生JavaScript返回IE瀏覽器的版本號1 function getIE(){ 2 if (window.ActiveXObject){ 3 var v = navigator.userAgent.match(/MSIE ([^;]+)/)[1]; 4 return parseFloat(v.substring(0, v.indexOf("."))) 5 } 6 return false 7 }46、原生JavaScript獲取頁面高度1 function getPageHeight(){ 2 var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat" 3 ? a 4 : g.documentElement; 5 return Math.max(f.scrollHeight, a.scrollHeight, d.clientHeight); 6 }47、原生JavaScript獲取頁面scrollLeft1 function getPageScrollLeft(){ 2 var a = document; 3 return a.documentElement.scrollLeft || a.body.scrollLeft; 4 }48、原生JavaScript獲取頁面可視寬度1 function getPageViewWidth(){ 2 var d = document, a = d.compatMode == "BackCompat" 3 ? d.body 4 : d.documentElement; 5 return a.clientWidth; 6 }49、原生JavaScript獲取頁面寬度1 function getPageWidth(){ 2 var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat" 3 ? a 4 : g.documentElement; 5 return Math.max(f.scrollWidth, a.scrollWidth, d.clientWidth); 6 }50、原生JavaScript獲取頁面scrollTop1 function getPageScrollTop(){ 2 var a = document; 3 return a.documentElement.scrollTop || a.body.scrollTop; 4 }51、原生JavaScript獲取頁面可視高度1 function getPageViewHeight() { 2 var d = document, a = d.compatMode == "BackCompat" 3 ? d.body 4 : d.documentElement; 5 return a.clientHeight; 6 }52、原生JavaScript跨瀏覽器添加事件1 function addEvt(oTarget,sEvtType,fnHandle){2 if(!oTarget){return;}3 if(oTarget.addEventListener){4 oTarget.addEventListener(sEvtType,fnHandle,false);5 }else if(oTarget.attachEvent){6 oTarget.attachEvent("on" + sEvtType,fnHandle);7 }else{8 oTarget["on" + sEvtType] = fnHandle;9 } 10 }53、原生JavaScript跨瀏覽器刪除事件1 function delEvt(oTarget,sEvtType,fnHandle){2 if(!oTarget){return;}3 if(oTarget.addEventListener){4 oTarget.addEventListener(sEvtType,fnHandle,false);5 }else if(oTarget.attachEvent){6 oTarget.attachEvent("on" + sEvtType,fnHandle);7 }else{8 oTarget["on" + sEvtType] = fnHandle;9 } 10 }54、原生JavaScript去掉url前綴1 function removeUrlPrefix(a){ 2 a=a.replace(/：/g,":").replace(/．/g,".").replace(/／/g,"/"); 3 while(trim(a).toLowerCase().indexOf("http://")==0){ 4 a=trim(a.replace(/http:\/\//i,"")); 5 } 6 return a; 7 }55、原生JavaScript隨機(jī)數(shù)時(shí)間戳1 function uniqueId(){ 2 var a=Math.random,b=parseInt; 3 return Number(new Date()).toString()+b(10*a())+b(10*a())+b(10*a()); 4 }56、原生JavaScript全角半角轉(zhuǎn)換,iCase: 0全到半，1半到全，其他不轉(zhuǎn)化1 function chgCase(sStr,iCase){2 if(typeof sStr != "string" || sStr.length <= 0 || !(iCase === 0 || iCase == 1)){3 return sStr;4 }5 var i,oRs=[],iCode;6 if(iCase){/*半->全*/7 for(i=0; i<sStr.length;i+=1){ 8 iCode = sStr.charCodeAt(i);9 if(iCode == 32){ 10 iCode = 12288; 11 }else if(iCode < 127){ 12 iCode += 65248; 13 } 14 oRs.push(String.fromCharCode(iCode)); 15 } 16 }else{/*全->半*/ 17 for(i=0; i<sStr.length;i+=1){ 18 iCode = sStr.charCodeAt(i); 19 if(iCode == 12288){ 20 iCode = 32; 21 }else if(iCode > 65280 && iCode < 65375){ 22 iCode -= 65248; 23 } 24 oRs.push(String.fromCharCode(iCode)); 25 } 26 } 27 return oRs.join(""); 28 }57、原生JavaScript確認(rèn)是否鍵盤有效輸入值1 function checkKey(iKey){2 if(iKey == 32 || iKey == 229){return true;}/*空格和異常*/3 if(iKey>47 && iKey < 58){return true;}/*數(shù)字*/4 if(iKey>64 && iKey < 91){return true;}/*字母*/5 if(iKey>95 && iKey < 108){return true;}/*數(shù)字鍵盤1*/6 if(iKey>108 && iKey < 112){return true;}/*數(shù)字鍵盤2*/7 if(iKey>185 && iKey < 193){return true;}/*符號1*/8 if(iKey>218 && iKey < 223){return true;}/*符號2*/9 return false; 10 }58、原生JavaScript獲取網(wǎng)頁被卷去的位置1 function getScrollXY() { 2 return document.body.scrollTop ? { 3 x: document.body.scrollLeft, 4 y: document.body.scrollTop 5 }: { 6 x: document.documentElement.scrollLeft, 7 y: document.documentElement.scrollTop 8 } 9 }59、原生JavaScript另一種正則日期格式化函數(shù)+調(diào)用方法1 Date.prototype.format = function(format){ //author: meizz2 var o = {3 "M+" : this.getMonth()+1, //month4 "d+" : this.getDate(), //day5 "h+" : this.getHours(), //hour6 "m+" : this.getMinutes(), //minute7 "s+" : this.getSeconds(), //second8 "q+" : Math.floor((this.getMonth()+3)/3), //quarter9 "S" : this.getMilliseconds() //millisecond 10 } 11 if(/(y+)/.test(format)) format=format.replace(RegExp.$1, 12 (this.getFullYear()+"").substr(4 - RegExp.$1.length)); 13 for(var k in o)if(new RegExp("("+ k +")").test(format)) 14 format = format.replace(RegExp.$1, 15 RegExp.$1.length==1 ? o[k] : 16 ("00"+ o[k]).substr((""+ o[k]).length)); 17 return format; 18 } 19 alert(new Date().format("yyyy-MM-dd hh:mm:ss"));60、原生JavaScript時(shí)間個(gè)性化輸出功能1 /*2 1、< 60s, 顯示為“剛剛”3 2、>= 1min && < 60 min, 顯示與當(dāng)前時(shí)間差“XX分鐘前”4 3、>= 60min && < 1day, 顯示與當(dāng)前時(shí)間差“今天 XX:XX”5 4、>= 1day && < 1year, 顯示日期“XX月XX日 XX:XX”6 5、>= 1year, 顯示具體日期“XXXX年XX月XX日 XX:XX”7 */8 function timeFormat(time){9 var date = new Date(time) 10 , curDate = new Date() 11 , year = date.getFullYear() 12 , month = date.getMonth() + 1 13 , day = date.getDate() 14 , hour = date.getHours() 15 , minute = date.getMinutes() 16 , curYear = curDate.getFullYear() 17 , curHour = curDate.getHours() 18 , timeStr; 19 20 if(year < curYear){ 21 timeStr = year +'年'+ month +'月'+ day +'日 '+ hour +':'+ minute; 22 }else{ 23 var pastTime = curDate - date 24 , pastH = pastTime/3600000; 25 26 if(pastH > curHour){ 27 timeStr = month +'月'+ day +'日 '+ hour +':'+ minute; 28 }else if(pastH >= 1){ 29 timeStr = '今天 ' + hour +':'+ minute +'分'; 30 }else{ 31 var pastM = curDate.getMinutes() - minute; 32 if(pastM > 1){ 33 timeStr = pastM +'分鐘前'; 34 }else{ 35 timeStr = '剛剛'; 36 } 37 } 38 } 39 return timeStr; 40 }61、原生JavaScript解決offsetX兼容性問題1 // 針對火狐不支持offsetX/Y2 function getOffset(e){3 var target = e.target, // 當(dāng)前觸發(fā)的目標(biāo)對象4 eventCoord,5 pageCoord,6 offsetCoord;7 8 // 計(jì)算當(dāng)前觸發(fā)元素到文檔的距離9 pageCoord = getPageCoord(target); 10 11 // 計(jì)算光標(biāo)到文檔的距離 12 eventCoord = { 13 X : window.pageXOffset + e.clientX, 14 Y : window.pageYOffset + e.clientY 15 }; 16 17 // 相減獲取光標(biāo)到第一個(gè)定位的父元素的坐標(biāo) 18 offsetCoord = { 19 X : eventCoord.X - pageCoord.X, 20 Y : eventCoord.Y - pageCoord.Y 21 }; 22 return offsetCoord; 23 } 24 25 function getPageCoord(element){ 26 var coord = { X : 0, Y : 0 }; 27 // 計(jì)算從當(dāng)前觸發(fā)元素到根節(jié)點(diǎn)為止， 28 // 各級 offsetParent 元素的 offsetLeft 或 offsetTop 值之和 29 while (element){ 30 coord.X += element.offsetLeft; 31 coord.Y += element.offsetTop; 32 element = element.offsetParent; 33 } 34 return coord; 35 }62、原生JavaScript常用的正則表達(dá)式1 //正整數(shù)2 /^[0-9]*[1-9][0-9]*$/;3 //負(fù)整數(shù)4 /^-[0-9]*[1-9][0-9]*$/;5 //正浮點(diǎn)數(shù)6 /^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/; 7 //負(fù)浮點(diǎn)數(shù)8 /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/; 9 //浮點(diǎn)數(shù) 10 /^(-?\d+)(\.\d+)?$/; 11 //email地址 12 /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/; 13 //url地址 14 /^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/; 15 //年/月/日（年-月-日、年.月.日） 16 /^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$/; 17 //匹配中文字符 18 /[\u4e00-\u9fa5]/; 19 //匹配帳號是否合法(字母開頭，允許5-10字節(jié)，允許字母數(shù)字下劃線) 20 /^[a-zA-Z][a-zA-Z0-9_]{4,9}$/; 21 //匹配空白行的正則表達(dá)式 22 /\n\s*\r/; 23 //匹配中國郵政編碼 24 /[1-9]\d{5}(?!\d)/; 25 //匹配身份證 26 /\d{15}|\d{18}/; 27 //匹配國內(nèi)電話號碼 28 /(\d{3}-|\d{4}-)?(\d{8}|\d{7})?/; 29 //匹配IP地址 30 /((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/; 31 //匹配首尾空白字符的正則表達(dá)式 32 /^\s*|\s*$/; 33 //匹配HTML標(biāo)記的正則表達(dá)式 34 < (\S*?)[^>]*>.*?|< .*? />;63、原生JavaScript實(shí)現(xiàn)返回頂部的通用方法1 function backTop(btnId) {2 var btn = document.getElementById(btnId);3 var d = document.documentElement;4 var b = document.body;5 window.onscroll = set;6 btn.style.display = "none";7 btn.onclick = function() {8 btn.style.display = "none";9 window.onscroll = null; 10 this.timer = setInterval(function() { 11 d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1); 12 b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1); 13 if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set); 14 }, 15 10); 16 }; 17 function set() { 18 btn.style.display = (d.scrollTop + b.scrollTop > 100) ? 'block': "none" 19 } 20 }; 21 backTop('goTop');64、原生JavaScript獲得URL中GET參數(shù)值1 // 用法：如果地址是 test.htm?t1=1&t2=2&t3=3, 那么能取得：GET["t1"], GET["t2"], GET["t3"]2 function get_get(){ 3 querystr = window.location.href.split("?")4 if(querystr[1]){5 GETs = querystr[1].split("&")6 GET =new Array()7 for(i=0;i<GETs.length;i++){8 tmp_arr = GETs[i].split("=")9 key=tmp_arr[0] 10 GET[key] = tmp_arr[1] 11 } 12 } 13 return querystr[1]; 14 }65、原生JavaScript實(shí)現(xiàn)全選通用方法1 function checkall(form, prefix, checkall) { 2 var checkall = checkall ? checkall : 'chkall'; 3 for(var i = 0; i < form.elements.length; i++) { 4 var e = form.elements[i]; 5 if(e.type=="checkbox"){ 6 e.checked = form.elements[checkall].checked; 7 } 8 } 9 }66、原生JavaScript實(shí)現(xiàn)全部取消選擇通用方法1 function uncheckAll(form) { 2 for (var i=0;i<form.elements.length;i++){ 3 var e = form.elements[i]; 4 if (e.name != 'chkall') 5 e.checked=!e.checked; 6 } 7 }67、原生JavaScript實(shí)現(xiàn)打開一個(gè)窗體通用方法1 function openWindow(url,windowName,width,height){2 var x = parseInt(screen.width / 2.0) - (width / 2.0); 3 var y = parseInt(screen.height / 2.0) - (height / 2.0);4 var isMSIE= (navigator.appName == "Microsoft Internet Explorer");5 if (isMSIE) {6 var p = "resizable=1,location=no,scrollbars=no,width=";7 p = p+width;8 p = p+",height=";9 p = p+height; 10 p = p+",left="; 11 p = p+x; 12 p = p+",top="; 13 p = p+y; 14 retval = window.open(url, windowName, p); 15 } else { 16 var win = window.open(url, "ZyiisPopup", "top=" + y + ",left=" + x + ",scrollbars=" + scrollbars + ",dialog=yes,modal=yes,width=" + width + ",height=" + height + ",resizable=no" ); 17 eval("try { win.resizeTo(width, height); } catch(e) { }"); 18 win.focus(); 19 } 20 }68、原生JavaScript判斷是否為客戶端設(shè)備1 function client(o){ 2 var b = navigator.userAgent.toLowerCase(); 3 var t = false;4 if (o == 'isOP'){5 t = b.indexOf('opera') > -1;6 }7 if (o == 'isIE'){8 t = b.indexOf('msie') > -1;9 } 10 if (o == 'isFF'){ 11 t = b.indexOf('firefox') > -1; 12 } 13 return t; 14 }69、原生JavaScript獲取單選按鈕的值1 function get_radio_value(field){2 if(field&&field.length){ 3 for(var i=0;i<field.length;i++){ 4 if(field[i].checked){ 5 return field[i].value; 6 } 7 } 8 }else { 9 return ; 10 } 11 }70、原生JavaScript獲取復(fù)選框的值1 function get_checkbox_value(field){ 2 if(field&&field.length){ 3 for(var i=0;i<field.length;i++){ 4 if(field[i].checked && !field[i].disabled){5 return field[i].value;6 }7 } 8 }else {9 return; 10 } 11 }71、原生JavaScript判斷是否為郵箱1 function isEmail(str){ 2 var re=/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/; 3 if (re.test(str) != true) { 4 return false; 5 }else{ 6 return true; 7 } 8 }72、原生JavaScript判斷是否有列表中的危險(xiǎn)字符1 function isValidReg(chars){ 2 var re=/<|>|\[|\]|\{|\}|『|』|※|○|●|◎|§|△|▲|☆|★|◇|◆|□|▼|㊣|﹋|⊕|⊙|〒|ㄅ|ㄆ|ㄇ|ㄈ|ㄉ|ㄊ|ㄋ|ㄌ|ㄍ|ㄎ|ㄏ|ㄐ|ㄑ|ㄒ|ㄓ|ㄔ|ㄕ|ㄖ|ㄗ|ㄘ|ㄙ|(zhì)ㄚ|ㄛ|ㄜ|ㄝ|ㄞ|ㄟ|ㄢ|ㄣ|ㄤ|ㄥ|ㄦ|ㄧ|ㄨ|ㄩ|■|▄|▆|\*|@|#|\^|\\/; 3 if (re.test( chars) == true) { 4 return false; 5 }else{ 6 return true; 7 } 8 }73、原生JavaScript判斷字符串是否大于規(guī)定的長度1 function isValidLength(chars, len) { 2 if (chars.length < len) { 3 return false; 4 } 5 return true; 6 }74、原生JavaScript判斷字符串是為網(wǎng)址不區(qū)分大小寫1 function isValidURL( chars ) {2 var re=/^([hH][tT]{2}[pP]:\/\/|[hH][tT]{2}[pP][sS]:\/\/)(\S+\.\S+)$/;3 if (!isNULL(chars)) {4 chars = jsTrim(chars);5 if (chars.match(re) == null)6 return false;7 else8 return true;9 } 10 return false; 11 }75、原生JavaScript判斷字符串是否為小數(shù)1 function isValidDecimal( chars ) { 2 var re=/^\d*\.?\d{1,2}$/; 3 if (chars.match(re) == null) 4 return false; 5 else 6 return true; 7 }76、原生JavaScript判斷字符串是否為整數(shù)1 function isNumber( chars ) { 2 var re=/^\d*$/; 3 if (chars.match(re) == null) 4 return false; 5 else 6 return true; 7 }77、原生JavaScript判斷字符串是否為浮點(diǎn)數(shù)1 function isFloat( str ) { 2 for(i=0;i<str.length;i++) { 3 if ((str.charAt(i)<"0" || str.charAt(i)>"9")&& str.charAt(i) != '.'){ 4 return false; 5 } 6 } 7 return true; 8 }78、原生JavaScript判斷字符是否為A-Za-z英文字母1 function isLetters( str ){ 2 var re=/^[A-Za-z]+$/; 3 if (str.match(re) == null) 4 return false; 5 else 6 return true; 7 }79、原生JavaScript判斷字符串是否郵政編碼1 function isValidPost( chars ) { 2 var re=/^\d{6}$/; 3 if (chars.match(re) == null) 4 return false; 5 else 6 return true; 7 }80、原生JavaScript判斷字符是否空NULL1 function isNULL( chars ) { 2 if (chars == null) 3 return true; 4 if (jsTrim(chars).length==0) 5 return true; 6 return false; 7 }81、原生JavaScript用正則表達(dá)式提取頁面代碼中所有網(wǎng)址1 var aa = document.documentElement.outerHTML.match(/(url\(|src=|href=)[\"\']*([^\"\'\(\)\<\>\[\] ]+)[\"\'\)]*|(http:\/\/[\w\-\.]+[^\"\'\(\)\<\>\[\] ]+)/ig).join("\r\n").replace(/^(src=|href=|url\()[\"\']*|[\"\'\>\) ]*$/igm,""); 2 alert(aa)82、原生JavaScript用正則表達(dá)式清除相同的數(shù)組(低效率)1 Array.prototype.unique=function(){ 2 return this.reverse().join(",").match(/([^,]+)(?!.*\1)/ig).reverse(); 3 }83、原生JavaScript用正則表達(dá)式清除相同的數(shù)組(高效率)1 String.prototype.unique=function(){2 var x=this.split(/[\r\n]+/);3 var y='';4 for(var i=0;i<x.length;i++){5 if(!new RegExp("^"+x[i].replace(/([^\w])/ig,"\\$1")+"$","igm").test(y)){6 y+=x[i]+"\r\n"7 }8 }9 return y 10 }84、原生JavaScript用正則表達(dá)式按字母排序，對每行進(jìn)行數(shù)組排序1 function SetSort(){ 2 var text=K1.value.split(/[\r\n]/).sort().join("\r\n");//順序 3 var test=K1.value.split(/[\r\n]/).sort().reverse().join("\r\n");//反序 4 K1.value=K1.value!=text?text:test; 5 }85、原生JavaScript字符串反序1 function IsReverse(text){ 2 return text.split('').reverse().join(''); 3 }86、原生JavaScript用正則表達(dá)式清除html代碼中的腳本1 function clear_script(){ 2 K1.value=K1.value.replace(/<script.*?>[\s\S]*?<\/script>|\s+on[a-zA-Z]{3,16}\s?=\s?"[\s\S]*?"|\s+on[a-zA-Z]{3,16}\s?=\s?'[\s\S]*?'|\s+on[a-zA-Z]{3,16}\s?=[^ >]+/ig,""); 3 }87、原生JavaScript動態(tài)執(zhí)行JavaScript腳本1 function javascript(){ 2 try{ 3 eval(K1.value); 4 }catch(e){ 5 alert(e.message); 6 } 7 }88、原生JavaScript動態(tài)執(zhí)行VBScript腳本1 function vbscript(){ 2 try{ 3 var script=document.getElementById("K1").value; 4 if(script.trim()=="")return; 5 window.execScript('On Error Resume Next \n'+script+'\n If Err.Number<>0 Then \n MsgBox "請輸入正確的VBScript腳本!",48,"腳本錯(cuò)誤!" \n End If',"vbscript") 6 }catch(e){ 7 alert(e.message); 8 } 9 }89、原生JavaScript實(shí)現(xiàn)金額大寫轉(zhuǎn)換函數(shù)1 function transform(tranvalue) {2 try {3 var i = 1;4 var dw2 = new Array("", "萬", "億"); //大單位5 var dw1 = new Array("拾", "佰", "仟"); //小單位6 var dw = new Array("零", "壹", "貳", "叁", "肆", "伍", "陸", "柒", "捌", "玖"); //整數(shù)部分用7 //以下是小寫轉(zhuǎn)換成大寫顯示在合計(jì)大寫的文本框中 8 //分離整數(shù)與小數(shù)9 var source = splits(tranvalue); 10 var num = source[0]; 11 var dig = source[1]; 12 //轉(zhuǎn)換整數(shù)部分 13 var k1 = 0; //計(jì)小單位 14 var k2 = 0; //計(jì)大單位 15 var sum = 0; 16 var str = ""; 17 var len = source[0].length; //整數(shù)的長度 18 for (i = 1; i <= len; i++) { 19 var n = source[0].charAt(len - i); //取得某個(gè)位數(shù)上的數(shù)字 20 var bn = 0; 21 if (len - i - 1 >= 0) { 22 bn = source[0].charAt(len - i - 1); //取得某個(gè)位數(shù)前一位上的數(shù)字 23 } 24 sum = sum + Number(n); 25 if (sum != 0) { 26 str = dw[Number(n)].concat(str); //取得該數(shù)字對應(yīng)的大寫數(shù)字，并插入到str字符串的前面 27 if (n == '0') sum = 0; 28 } 29 if (len - i - 1 >= 0) { //在數(shù)字范圍內(nèi) 30 if (k1 != 3) { //加小單位 31 if (bn != 0) { 32 str = dw1[k1].concat(str); 33 } 34 k1++; 35 } else { //不加小單位，加大單位 36 k1 = 0; 37 var temp = str.charAt(0); 38 if (temp == "萬" || temp == "億") //若大單位前沒有數(shù)字則舍去大單位 39 str = str.substr(1, str.length - 1); 40 str = dw2[k2].concat(str); 41 sum = 0; 42 } 43 } 44 if (k1 == 3) //小單位到千則大單位進(jìn)一 45 { 46 k2++; 47 } 48 } 49 //轉(zhuǎn)換小數(shù)部分 50 var strdig = ""; 51 if (dig != "") { 52 var n = dig.charAt(0); 53 if (n != 0) { 54 strdig += dw[Number(n)] + "角"; //加數(shù)字 55 } 56 var n = dig.charAt(1); 57 if (n != 0) { 58 strdig += dw[Number(n)] + "分"; //加數(shù)字 59 } 60 } 61 str += "元" + strdig; 62 } catch(e) { 63 return "0元"; 64 } 65 return str; 66 } 67 //拆分整數(shù)與小數(shù) 68 function splits(tranvalue) { 69 var value = new Array('', ''); 70 temp = tranvalue.split("."); 71 for (var i = 0; i < temp.length; i++) { 72 value[i] = temp[i]; 73 } 74 return value; 75 }90、原生JavaScript常用的正則表達(dá)式大收集1 匹配中文字符的正則表達(dá)式： [\u4e00-\u9fa5] 2 匹配雙字節(jié)字符（包括漢字在內(nèi)）：[^\x00-\xff] 3 匹配空行的正則表達(dá)式：\n[\s| ]*\r 4 匹配 HTML 標(biāo)記的正則表達(dá)式：<(.*)>.*<\/\1>|<(.*) \/>5 匹配首尾空格的正則表達(dá)式：(^\s*)|(\s*$) 6 匹配 IP 地址的正則表達(dá)式：/(\d+)\.(\d+)\.(\d+)\.(\d+)/g7 匹配 Email 地址的正則表達(dá)式：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*8 匹配網(wǎng)址 URL 的正則表達(dá)式：http://(/[\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?9 sql 語句：^(select|drop|delete|create|update|insert).*$ 10 非負(fù)整數(shù)：^\d+$ 11 正整數(shù)：^[0-9]*[1-9][0-9]*$ 12 非正整數(shù)：^((-\d+)|(0+))$ 13 負(fù)整數(shù)：^-[0-9]*[1-9][0-9]*$ 14 整數(shù)：^-?\d+$ 15 非負(fù)浮點(diǎn)數(shù)：^\d+(\.\d+)?$ 16 正浮點(diǎn)數(shù)：^((0-9)+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$ 17 非正浮點(diǎn)數(shù)：^((-\d+\.\d+)?)|(0+(\.0+)?))$ 18 英文字符串：^[A-Za-z]+$ 19 英文大寫串：^[A-Z]+$ 20 英文小寫串：^[a-z]+$ 21 英文字符數(shù)字串：^[A-Za-z0-9]+$ 22 英數(shù)字加下劃線串：^\w+$ 23 E-mail地址：^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$ 24 URL：^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\s*)?$ 或：^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$ 25 郵政編碼：^[1-9]\d{5}$ 26 電話號碼：^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?$ 27 手機(jī)號碼：^((\(\d{2,3}\))|(\d{3}\-))?13\d{9}$ 28 雙字節(jié)字符（包括漢字在內(nèi)）：^\x00-\xff 29 匹配首尾空格：(^\s*)|(\s*$) 30 匹配 HTML 標(biāo)記：<(.*)>.*<\/\1>|<(.*) \/> 31 匹配空行：\n[\s| ]*\r 32 提取信息中的網(wǎng)絡(luò)鏈接：(h|H)(r|R)(e|E)(f|F) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)? 33 提取信息中的郵件地址：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)* 34 提取信息中的圖片鏈接：(s|S)(r|R)(c|C) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)? 35 提取信息中的 IP 地址：(\d+)\.(\d+)\.(\d+)\.(\d+) 36 提取信息中的中國手機(jī)號碼：(86)*0*13\d{9} 37 提取信息中的中國固定電話號碼：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{8} 38 提取信息中的中國電話號碼（包括移動和固定電話）：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{7,14} 39 提取信息中的中國郵政編碼：[1-9]{1}(\d+){5} 40 提取信息中的浮點(diǎn)數(shù)（即小數(shù)）：(-?\d*)\.?\d+ 41 提取信息中的任何數(shù)字 ：(-?\d*)(\.\d+)? 42 IP：(\d+)\.(\d+)\.(\d+)\.(\d+) 43 電話區(qū)號：^0\d{2,3}$ 44 騰訊 QQ 號：^[1-9]*[1-9][0-9]*$ 45 帳號（字母開頭，允許 5-16 字節(jié)，允許字母數(shù)字下劃線）：^[a-zA-Z][a-zA-Z0-9_]{4,15}$ 46 中文、英文、數(shù)字及下劃線：^[\u4e00-\u9fa5_a-zA-Z0-9]+$91、原生JavaScript實(shí)現(xiàn)窗體改變事件resize的操作（兼容所以的瀏覽器）1 (function(){2 var fn = function(){3 var w = document.documentElement ? document.documentElement.clientWidth : document.body.clientWidth4 ,r = 12555 ,b = Element.extend(document.body)6 ,classname = b.className;7 if(w < r){8 //當(dāng)窗體的寬度小于1255的時(shí)候執(zhí)行相應(yīng)的操作9 }else{ 10 //當(dāng)窗體的寬度大于1255的時(shí)候執(zhí)行相應(yīng)的操作 11 } 12 } 13 if(window.addEventListener){ 14 window.addEventListener('resize', function(){ fn(); }); 15 }else if(window.attachEvent){ 16 window.attachEvent('onresize', function(){ fn(); }); 17 } 18 fn(); 19 })();92、原生JavaScript用正則清除空格分左右1 function ltrim(s){ return s.replace( /^(\s*|　*)/, ""); } 2 function rtrim(s){ return s.replace( /(\s*|　*)$/, ""); } 3 function trim(s){ return ltrim(rtrim(s));} 93、原生JavaScript判斷變量是否空值1 /**2 * 判斷變量是否空值3 * undefined, null, '', false, 0, [], {} 均返回true，否則返回false4 */5 function empty(v){6 switch (typeof v){7 case 'undefined' : return true;8 case 'string' : if(trim(v).length == 0) return true; break;9 case 'boolean' : if(!v) return true; break; 10 case 'number' : if(0 === v) return true; break; 11 case 'object' : 12 if(null === v) return true; 13 if(undefined !== v.length && v.length==0) return true; 14 for(var k in v){return false;} return true; 15 break; 16 } 17 return false; 18 }94、原生JavaScript實(shí)現(xiàn)base64解碼1 function base64_decode(data){2 var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";3 var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,ac = 0,dec = "",tmp_arr = [];4 if (!data) { return data; }5 data += '';6 do { 7 h1 = b64.indexOf(data.charAt(i++));8 h2 = b64.indexOf(data.charAt(i++));9 h3 = b64.indexOf(data.charAt(i++)); 10 h4 = b64.indexOf(data.charAt(i++)); 11 bits = h1 << 18 | h2 << 12 | h3 << 6 | h4; 12 o1 = bits >> 16 & 0xff; 13 o2 = bits >> 8 & 0xff; 14 o3 = bits & 0xff; 15 if (h3 == 64) { 16 tmp_arr[ac++] = String.fromCharCode(o1); 17 } else if (h4 == 64) { 18 tmp_arr[ac++] = String.fromCharCode(o1, o2); 19 } else { 20 tmp_arr[ac++] = String.fromCharCode(o1, o2, o3); 21 } 22 } while (i < data.length); 23 dec = tmp_arr.join(''); 24 dec = utf8_decode(dec); 25 return dec; 26 }95、原生JavaScript實(shí)現(xiàn)utf8解碼1 function utf8_decode(str_data){2 var tmp_arr = [],i = 0,ac = 0,c1 = 0,c2 = 0,c3 = 0;str_data += '';3 while (i < str_data.length) {4 c1 = str_data.charCodeAt(i);5 if (c1 < 128) {6 tmp_arr[ac++] = String.fromCharCode(c1);7 i++;8 } else if (c1 > 191 && c1 < 224) { 9 c2 = str_data.charCodeAt(i + 1); 10 tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63)); 11 i += 2; 12 } else { 13 c2 = str_data.charCodeAt(i + 1); 14 c3 = str_data.charCodeAt(i + 2); 15 tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)); 16 i += 3; 17 } 18 } 19 return tmp_arr.join(''); 20 }96、原生JavaScript獲取窗體可見范圍的寬與高1 function getViewSize(){ 2 var de=document.documentElement; 3 var db=document.body; 4 var viewW=de.clientWidth==0 ? db.clientWidth : de.clientWidth; 5 var viewH=de.clientHeight==0 ? db.clientHeight : de.clientHeight; 6 return Array(viewW ,viewH); 7 }97、原生JavaScript判斷IE版本號（既簡潔、又向后兼容！）1 var _IE = (function(){ 2 var v = 3, div = document.createElement('div'), all = div.getElementsByTagName('i'); 3 while ( 4 div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->', 5 all[0] 6 ); 7 return v > 4 ? v : false ; 8 }());98、原生JavaScript獲取瀏覽器版本號1 function browserVersion(types) {2 var other = 1;3 for (i in types) {4 var v = types[i] ? types[i] : i;5 if (USERAGENT.indexOf(v) != -1) {6 var re = new RegExp(v + '(\\/|\\s|:)([\\d\\.]+)', 'ig');7 var matches = re.exec(USERAGENT);8 var ver = matches != null ? matches[2] : 0;9 other = ver !== 0 && v != 'mozilla' ? 0 : other; 10 } else { 11 var ver = 0; 12 } 13 eval('BROWSER.' + i + '= ver'); 14 } 15 BROWSER.other = other; 16 }99、原生JavaScript半角轉(zhuǎn)換為全角函數(shù)1 function ToDBC(str){2 var result = '';3 for(var i=0; i < str.length; i++){4 code = str.charCodeAt(i);5 if(code >= 33 && code <= 126){6 result += String.fromCharCode(str.charCodeAt(i) + 65248);7 }else if (code == 32){8 result += String.fromCharCode(str.charCodeAt(i) + 12288 - 32);9 }else{ 10 result += str.charAt(i); 11 } 12 } 13 return result; 14 }100、原生JavaScript全角轉(zhuǎn)換為半角函數(shù)1 function ToCDB(str){2 var result = '';3 for(var i=0; i < str.length; i++){4 code = str.charCodeAt(i);5 if(code >= 65281 && code <= 65374){6 result += String.fromCharCode(str.charCodeAt(i) - 65248);7 }else if (code == 12288){8 result += String.fromCharCode(str.charCodeAt(i) - 12288 + 32);9 }else{ 10 result += str.charAt(i); 11 } 12 } 13 return result; 14 }

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posted on 2017-04-08 23:22 Pioneer.HengYu 閱讀(...) 評論(...) 編輯 收藏

轉(zhuǎn)載于:https://www.cnblogs.com/Pioneer-HengYu/p/6683430.html

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