Javscript常识
来源：互联网 发布：java去掉字符串空格 编辑：程序博客网 时间：2024/06/01 08:45
1、原生JavaScript实现字符串长度截取
function cutstr(str, len) { var temp; var icount = 0; var patrn = /[^\x00-\xff]/; var strre = ""; for (var i = 0; i < str.length; i++) { if (icount < len - 1) { temp = str.substr(i, 1); if (patrn.exec(temp) == null) { icount = icount + 1 } else { icount = icount + 2 } strre += temp } else { break } } return strre + "..."}
2、原生JavaScript获取域名主机
function getHost(url) { var host = "null"; if(typeof url == "undefined"|| null == url) { url = window.location.href; } var regex = /^\w+\:\/\/([^\/]*).*/; var match = url.match(regex); if(typeof match != "undefined" && null != match) { host = match[1]; } return host;}3、原生JavaScript清除空格
String.prototype.trim = function() { var reExtraSpace = /^\s*(.*?)\s+$/; return this.replace(reExtraSpace, "$1")}4、原生JavaScript替换全部
String.prototype.replaceAll = function(s1, s2) { return this.replace(new RegExp(s1, "gm"), s2)}5、原生JavaScript转义html标签
function HtmlEncode(text) { return text.replace(/&/g, '&').replace(/\"/g, '"').replace(/</g, '<').replace(/>/g, '>')}6、原生JavaScript还原html标签
function HtmlDecode(text) { return text.replace(/&/g, '&').replace(/"/g, '\"').replace(/</g, '<').replace(/>/g, '>')}7、原生JavaScript时间日期格式转换
Date.prototype.Format = function(formatStr) { var str = formatStr; var Week = ['日', '一', '二', '三', '四', '五', '六']; str = str.replace(/yyyy|YYYY/, this.getFullYear()); str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this.getYear() % 100)); str = str.replace(/MM/, (this.getMonth() + 1) > 9 ? (this.getMonth() + 1).toString() : '0' + (this.getMonth() + 1)); str = str.replace(/M/g, (this.getMonth() + 1)); str = str.replace(/w|W/g, Week[this.getDay()]); str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate()); str = str.replace(/d|D/g, this.getDate()); str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours()); str = str.replace(/h|H/g, this.getHours()); str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes()); str = str.replace(/m/g, this.getMinutes()); str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds()); str = str.replace(/s|S/g, this.getSeconds()); return str}8、原生JavaScript判断是否为数字类型
function isDigit(value) { var patrn = /^[0-9]*$/; if (patrn.exec(value) == null || value == "") { return false } else { return true }}9、原生JavaScript设置cookie值
function setCookie(name, value, Hours) { var d = new Date(); var offset = 8; var utc = d.getTime() + (d.getTimezoneOffset() * 60000); var nd = utc + (3600000 * offset); var exp = new Date(nd); exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000); document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;"}10、原生JavaScript获取cookie值
function getCookie(name) { var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)")); if (arr != null) return unescape(arr[2]); return null}11、原生JavaScript加入收藏夹
function AddFavorite(sURL, sTitle) { try { window.external.addFavorite(sURL, sTitle) } catch(e) { try { window.sidebar.addPanel(sTitle, sURL, "") } catch(e) { alert("加入收藏失败，请使用Ctrl+D进行添加") } }}12、原生JavaScript设为首页
function setHomepage() { if (document.all) { document.body.style.behavior = 'url(#default#homepage)'; document.body.setHomePage('http://www.jq-school.com') } else if (window.sidebar) { if (window.netscape) { try { netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect") } catch(e) { alert("该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true") } } var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch); prefs.setCharPref('browser.startup.homepage', 'http://www.jq-school.com') }}13、原生JavaScript判断IE6
var ua = navigator.userAgent.toLowerCase();var isIE6 = ua.indexOf("msie 6") > -1;if (isIE6) { try { document.execCommand("BackgroundImageCache", false, true) } catch(e) {}}14、原生JavaScript加载样式文件
function LoadStyle(url) { try { document.createStyleSheet(url) } catch(e) { var cssLink = document.createElement('link'); cssLink.rel = 'stylesheet'; cssLink.type = 'text/css'; cssLink.href = url; var head = document.getElementsByTagName('head')[0]; head.appendChild(cssLink) }}15、原生JavaScript返回脚本内容
function evalscript(s) { if(s.indexOf('<script') == -1) return s; var p = /<script[^\>]*?>([^\x00]*?)<\/script>/ig; var arr = []; while(arr = p.exec(s)) { var p1 = /<script[^\>]*?src=\"([^\>]*?)\"[^\>]*?(reload=\"1\")?(?:charset=\"([\w\-]+?)\")?><\/script>/i; var arr1 = []; arr1 = p1.exec(arr[0]); if(arr1) { appendscript(arr1[1], '', arr1[2], arr1[3]); } else { p1 = /<script(.*?)>([^\x00]+?)<\/script>/i; arr1 = p1.exec(arr[0]); appendscript('', arr1[2], arr1[1].indexOf('reload=') != -1); } } return s;}16、原生JavaScript清除脚本内容
function stripscript(s) { return s.replace(/<script.*?>.*?<\/script>/ig, '');}17、原生JavaScript动态加载脚本文件
function appendscript(src, text, reload, charset) { var id = hash(src + text); if(!reload && in_array(id, evalscripts)) return; if(reload && $(id)) { $(id).parentNode.removeChild($(id)); } evalscripts.push(id); var scriptNode = document.createElement("script"); scriptNode.type = "text/javascript"; scriptNode.id = id; scriptNode.charset = charset ? charset : (BROWSER.firefox ? document.characterSet : document.charset); try { if(src) { scriptNode.src = src; scriptNode.onloadDone = false; scriptNode.onload = function () { scriptNode.onloadDone = true; JSLOADED[src] = 1; }; scriptNode.onreadystatechange = function () { if((scriptNode.readyState == 'loaded' || scriptNode.readyState == 'complete') && !scriptNode.onloadDone) { scriptNode.onloadDone = true; JSLOADED[src] = 1; } }; } else if(text){ scriptNode.text = text; } document.getElementsByTagName('head')[0].appendChild(scriptNode); } catch(e) {}}18、原生JavaScript返回按ID检索的元素对象
function $(id) { return !id ? null : document.getElementById(id);}19、原生JavaScript返回浏览器版本内容
function browserVersion(types) { var other = 1; for(i in types) { var v = types<i> ? types<i> : i; if(USERAGENT.indexOf(v) != -1) { var re = new RegExp(v + '(\\/|\\s)([\\d\\.]+)', 'ig'); var matches = re.exec(USERAGENT); var ver = matches != null ? matches[2] : 0; other = ver !== 0 && v != 'mozilla' ? 0 : other; }else { var ver = 0; } eval('BROWSER.' + i + '= ver'); } BROWSER.other = other;}20、原生JavaScript元素显示的通用方法
function $(id) { return !id ? null : document.getElementById(id);}function display(id) { var obj = $(id); if(obj.style.visibility) { obj.style.visibility = obj.style.visibility == 'visible' ? 'hidden' : 'visible'; } else { obj.style.display = obj.style.display == '' ? 'none' : ''; }}21、原生JavaScript中有insertBefore方法,可惜却没有insertAfter方法?用如下函数实现
function insertAfter(newChild,refChild){ var parElem=refChild.parentNode; if(parElem.lastChild==refChild){ refChild.appendChild(newChild); }else{ parElem.insertBefore(newChild,refChild.nextSibling); }} 22、原生JavaScript中兼容浏览器绑定元素事件
function addEventSamp(obj,evt,fn){ if (obj.addEventListener) { obj.addEventListener(evt, fn, false); }else if(obj.attachEvent){ obj.attachEvent('on'+evt,fn); }}23、原生JavaScript光标停在文字的后面，文本框获得焦点时调用
function focusLast(){ var e = event.srcElement; var r =e.createTextRange(); r.moveStart('character',e.value.length); r.collapse(true); r.select();}24、原生JavaScript检验URL链接是否有效
function getUrlState(URL){ var xmlhttp = new ActiveXObject("microsoft.xmlhttp"); xmlhttp.Open("GET",URL, false); try{ xmlhttp.Send(); }catch(e){ }finally{ var result = xmlhttp.responseText; if(result){ if(xmlhttp.Status==200){ return(true); }else{ return(false); } }else{ return(false); } }}25、原生JavaScript格式化CSS样式代码
function formatCss(s){//格式化代码 s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1"); s = s.replace(/;\s*;/g, ";"); //清除连续分号 s = s.replace(/\,[\s\.\#\d]*{/g, "{"); s = s.replace(/([^\s])\{([^\s])/g, "$1 {\n\t$2"); s = s.replace(/([^\s])\}([^\n]*)/g, "$1\n}\n$2"); s = s.replace(/([^\s]);([^\s\}])/g, "$1;\n\t$2"); return s;}26、原生JavaScript压缩CSS样式代码
function yasuoCss (s) {//压缩代码 s = s.replace(/\/\*(.|\n)*?\*\//g, ""); //删除注释 s = s.replace(/\s*([\{\}\:\;\,])\s*/g, "$1"); s = s.replace(/\,[\s\.\#\d]*\{/g, "{"); //容错处理 s = s.replace(/;\s*;/g, ";"); //清除连续分号 s = s.match(/^\s*(\S+(\s+\S+)*)\s*$/); //去掉首尾空白 return (s == null) ? "" : s[1];}27、原生JavaScript获取当前路径
var currentPageUrl = "";if (typeof this.href === "undefined") { currentPageUrl = document.location.toString().toLowerCase();}else { currentPageUrl = this.href.toString().toLowerCase();}28、原生JavaScriptIP转成整型
function _ip2int(ip){ var num = 0; ip = ip.split("."); num = Number(ip[0]) * 256 * 256 * 256 + Number(ip[1]) * 256 * 256 + Number(ip[2]) * 256 + Number(ip[3]); num = num >>> 0; return num;}29、原生JavaScript整型解析为IP地址
function _int2iP(num){ var str; var tt = new Array(); tt[0] = (num >>> 24) >>> 0; tt[1] = ((num << 8) >>> 24) >>> 0; tt[2] = (num << 16) >>> 24; tt[3] = (num << 24) >>> 24; str = String(tt[0]) + "." + String(tt[1]) + "." + String(tt[2]) + "." + String(tt[3]); return str;}30、原生JavaScript实现checkbox全选与全不选
function checkAll() { var selectall = document.getElementById("selectall"); var allbox = document.getElementsByName("allbox"); if (selectall.checked) { for (var i = 0; i < allbox.length; i++) { allbox.checked = true; } } else { for (var i = 0; i < allbox.length; i++) { allbox.checked = false; } }}31、原生 JavaScript判断是否移动设备
function isMobile(){ if (typeof this._isMobile === 'boolean'){ return this._isMobile; } var screenWidth = this.getScreenWidth(); var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new"); if(!fixViewPortsExperiment){ if(!this.isAppleMobileDevice()){ screenWidth = screenWidth/window.devicePixelRatio; } } var isMobileScreenSize = screenWidth < 600; var isMobileUserAgent = false; this._isMobile = isMobileScreenSize && this.isTouchScreen(); return this._isMobile;}32、原生JavaScript判断是否移动设备访问
function isAppleMobileDevice(){ return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));}33、原生JavaScript判断是否苹果移动设备访问
function isAppleMobileDevice(){ return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));}34、原生JavaScript判断是否安卓移动设备访问
function isAndroidMobileDevice(){ return (/android/i.test(navigator.userAgent.toLowerCase()));}35、原生JavaScript判断是否Touch屏幕
function isTouchScreen(){ return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch);}36、原生JavaScript判断是否在安卓上的谷歌浏览器
function isNewChromeOnAndroid(){ if(this.isAndroidMobileDevice()){ var userAgent = navigator.userAgent.toLowerCase(); if((/chrome/i.test(userAgent))){ var parts = userAgent.split('chrome/'); var fullVersionString = parts[1].split(" ")[0]; var versionString = fullVersionString.split('.')[0]; var version = parseInt(versionString); if(version >= 27){ return true; } } } return false;}37、原生JavaScript判断是否打开视窗
function isViewportOpen() { return !!document.getElementById('wixMobileViewport');}38、原生JavaScript获取移动设备初始化大小
function getInitZoom(){ if(!this._initZoom){ var screenWidth = Math.min(screen.height, screen.width); if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){ screenWidth = screenWidth/window.devicePixelRatio; } this._initZoom = screenWidth /document.body.offsetWidth; } return this._initZoom;}39、原生JavaScript获取移动设备最大化大小
function getZoom(){ var screenWidth = (Math.abs(window.orientation) === 90) ? Math.max(screen.height, screen.width) : Math.min(screen.height, screen.width); if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){ screenWidth = screenWidth/window.devicePixelRatio; } var FixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var FixViewPortsExperimentRunning = FixViewPortsExperiment && (FixViewPortsExperiment === "New" || FixViewPortsExperiment === "new"); if(FixViewPortsExperimentRunning){ return screenWidth / window.innerWidth; }else{ return screenWidth / document.body.offsetWidth; }}40、原生JavaScript获取移动设备屏幕宽度
function getScreenWidth(){ var smallerSide = Math.min(screen.width, screen.height); var fixViewPortsExperiment = rendererModel.runningExperiments.FixViewport || rendererModel.runningExperiments.fixviewport; var fixViewPortsExperimentRunning = fixViewPortsExperiment && (fixViewPortsExperiment.toLowerCase() === "new"); if(fixViewPortsExperiment){ if(this.isAndroidMobileDevice() && !this.isNewChromeOnAndroid()){ smallerSide = smallerSide/window.devicePixelRatio; } } return smallerSide;}41、原生 JavaScript完美判断是否为网址
function IsURL(strUrl) { 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 if (regular.test(strUrl)) { return true; } else { return false; }}42、原生JavaScript根据样式名称检索元素对象
function getElementsByClassName(name) { var tags = document.getElementsByTagName('*') || document.all; var els = []; for (var i = 0; i < tags.length; i++) { if (tags.className) { var cs = tags.className.split(' '); for (var j = 0; j < cs.length; j++) { if (name == cs[j]) { els.push(tags); break } } } } return els}43、原生JavaScript判断是否以某个字符串开头
String.prototype.startWith = function (s) { return this.indexOf(s) == 0}44、原生JavaScript判断是否以某个字符串结束
String.prototype.endWith = function (s) { var d = this.length - s.length; return (d >= 0 && this.lastIndexOf(s) == d)}45、原生JavaScript返回IE浏览器的版本号
function getIE(){ if (window.ActiveXObject){ var v = navigator.userAgent.match(/MSIE ([^;]+)/)[1]; return parseFloat(v.substring(0, v.indexOf("."))) } return false}46、原生JavaScript获取页面高度
function getPageHeight(){ var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat" ? a : g.documentElement; return Math.max(f.scrollHeight, a.scrollHeight, d.clientHeight);}47、原生JavaScript获取页面scrollLeft
function getPageScrollLeft(){ var a = document; return a.documentElement.scrollLeft || a.body.scrollLeft;}48、原生JavaScript获取页面可视宽度
function getPageViewWidth(){ var d = document, a = d.compatMode == "BackCompat" ? d.body : d.documentElement; return a.clientWidth;}49、原生JavaScript获取页面宽度
function getPageWidth(){ var g = document, a = g.body, f = g.documentElement, d = g.compatMode == "BackCompat" ? a : g.documentElement; return Math.max(f.scrollWidth, a.scrollWidth, d.clientWidth);}50、原生JavaScript获取页面scrollTop
function getPageScrollTop(){ var a = document; return a.documentElement.scrollTop || a.body.scrollTop;}51、原生JavaScript获取页面可视高度
function getPageViewHeight() { var d = document, a = d.compatMode == "BackCompat" ? d.body : d.documentElement; return a.clientHeight;}52、原生JavaScript跨浏览器添加事件
function addEvt(oTarget,sEvtType,fnHandle){ if(!oTarget){return;} if(oTarget.addEventListener){ oTarget.addEventListener(sEvtType,fnHandle,false); }else if(oTarget.attachEvent){ oTarget.attachEvent("on" + sEvtType,fnHandle); }else{ oTarget["on" + sEvtType] = fnHandle; }}53、原生JavaScript跨浏览器删除事件
function delEvt(oTarget,sEvtType,fnHandle){ if(!oTarget){return;} if(oTarget.addEventListener){ oTarget.addEventListener(sEvtType,fnHandle,false); }else if(oTarget.attachEvent){ oTarget.attachEvent("on" + sEvtType,fnHandle); }else{ oTarget["on" + sEvtType] = fnHandle; }}54、原生JavaScript去掉url前缀
function removeUrlPrefix(a){ a=a.replace(/：/g,":").replace(/．/g,".").replace(/／/g,"/"); while(trim(a).toLowerCase().indexOf("http://")==0){ a=trim(a.replace(/http:\/\//i,"")); } return a;}55、原生JavaScript随机数时间戳
function uniqueId(){ var a=Math.random,b=parseInt; return Number(new Date()).toString()+b(10*a())+b(10*a())+b(10*a());}56、原生JavaScript全角半角转换,iCase: 0全到半，1半到全，其他不转化
function chgCase(sStr,iCase){ if(typeof sStr != "string" || sStr.length <= 0 || !(iCase === 0 || iCase == 1)){ return sStr; } var i,oRs=[],iCode; if(iCase){/*半->全*/ for(i=0; i<sStr.length;i+=1){ iCode = sStr.charCodeAt(i); if(iCode == 32){ iCode = 12288; }else if(iCode < 127){ iCode += 65248; } oRs.push(String.fromCharCode(iCode)); } }else{/*全->半*/ for(i=0; i<sStr.length;i+=1){ iCode = sStr.charCodeAt(i); if(iCode == 12288){ iCode = 32; }else if(iCode > 65280 && iCode < 65375){ iCode -= 65248; } oRs.push(String.fromCharCode(iCode)); } } return oRs.join(""); }57、原生JavaScript确认是否键盘有效输入值
function checkKey(iKey){ if(iKey == 32 || iKey == 229){return true;}/*空格和异常*/ if(iKey>47 && iKey < 58){return true;}/*数字*/ if(iKey>64 && iKey < 91){return true;}/*字母*/ if(iKey>95 && iKey < 108){return true;}/*数字键盘1*/ if(iKey>108 && iKey < 112){return true;}/*数字键盘2*/ if(iKey>185 && iKey < 193){return true;}/*符号1*/ if(iKey>218 && iKey < 223){return true;}/*符号2*/ return false;}58、原生JavaScript获取网页被卷去的位置
function getScrollXY() { return document.body.scrollTop ? { x: document.body.scrollLeft, y: document.body.scrollTop }: { x: document.documentElement.scrollLeft, y: document.documentElement.scrollTop }}59、原生JavaScript另一种正则日期格式化函数+调用方法
Date.prototype.format = function(format){ //author: meizz var o = { "M+" : this.getMonth()+1, //month "d+" : this.getDate(), //day "h+" : this.getHours(), //hour "m+" : this.getMinutes(), //minute "s+" : this.getSeconds(), //second "q+" : Math.floor((this.getMonth()+3)/3), //quarter "S" : this.getMilliseconds() //millisecond } if(/(y+)/.test(format)) format=format.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length)); for(var k in o)if(new RegExp("("+ k +")").test(format)) format = format.replace(RegExp.$1, RegExp.$1.length==1 ? o[k] : ("00"+ o[k]).substr((""+ o[k]).length)); return format;}alert(new Date().format("yyyy-MM-dd hh:mm:ss"));60、原生JavaScript时间个性化输出功能
/*1、< 60s, 显示为“刚刚”2、>= 1min && < 60 min, 显示与当前时间差“XX分钟前”3、>= 60min && < 1day, 显示与当前时间差“今天 XX:XX”4、>= 1day && < 1year, 显示日期“XX月XX日 XX:XX”5、>= 1year, 显示具体日期“XXXX年XX月XX日 XX:XX”*/function timeFormat(time){ var date = new Date(time) , curDate = new Date() , year = date.getFullYear() , month = date.getMonth() + 1 , day = date.getDate() , hour = date.getHours() , minute = date.getMinutes() , curYear = curDate.getFullYear() , curHour = curDate.getHours() , timeStr; if(year < curYear){ timeStr = year +'年'+ month +'月'+ day +'日 '+ hour +':'+ minute; }else{ var pastTime = curDate - date , pastH = pastTime/3600000; if(pastH > curHour){ timeStr = month +'月'+ day +'日 '+ hour +':'+ minute; }else if(pastH >= 1){ timeStr = '今天 ' + hour +':'+ minute +'分'; }else{ var pastM = curDate.getMinutes() - minute; if(pastM > 1){ timeStr = pastM +'分钟前'; }else{ timeStr = '刚刚'; } } } return timeStr;}61、原生JavaScript解决offsetX兼容性问题
// 针对火狐不支持offsetX/Yfunction getOffset(e){ var target = e.target, // 当前触发的目标对象 eventCoord, pageCoord, offsetCoord; // 计算当前触发元素到文档的距离 pageCoord = getPageCoord(target); // 计算光标到文档的距离 eventCoord = { X : window.pageXOffset + e.clientX, Y : window.pageYOffset + e.clientY }; // 相减获取光标到第一个定位的父元素的坐标 offsetCoord = { X : eventCoord.X - pageCoord.X, Y : eventCoord.Y - pageCoord.Y }; return offsetCoord;} function getPageCoord(element){ var coord = { X : 0, Y : 0 }; // 计算从当前触发元素到根节点为止， // 各级 offsetParent 元素的 offsetLeft 或 offsetTop 值之和 while (element){ coord.X += element.offsetLeft; coord.Y += element.offsetTop; element = element.offsetParent; } return coord;}62、原生JavaScript常用的正则表达式
//正整数/^[0-9]*[1-9][0-9]*$/;//负整数/^-[0-9]*[1-9][0-9]*$/;//正浮点数/^(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/; //负浮点数/^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/; //浮点数/^(-?\d+)(\.\d+)?$/;//email地址/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/;//url地址/^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/;//年/月/日（年-月-日、年.月.日）/^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$/;//匹配中文字符/[\u4e00-\u9fa5]/;//匹配帐号是否合法(字母开头，允许5-10字节，允许字母数字下划线)/^[a-zA-Z][a-zA-Z0-9_]{4,9}$/;//匹配空白行的正则表达式/\n\s*\r/;//匹配中国邮政编码/[1-9]\d{5}(?!\d)/;//匹配身份证/\d{15}|\d{18}/;//匹配国内电话号码/(\d{3}-|\d{4}-)?(\d{8}|\d{7})?/;//匹配IP地址/((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)/;//匹配首尾空白字符的正则表达式/^\s*|\s*$/;//匹配HTML标记的正则表达式< (\S*?)[^>]*>.*?|< .*? />;63、原生JavaScript实现返回顶部的通用方法
function backTop(btnId) { var btn = document.getElementById(btnId); var d = document.documentElement; var b = document.body; window.onscroll = set; btn.style.display = "none"; btn.onclick = function() { btn.style.display = "none"; window.onscroll = null; this.timer = setInterval(function() { d.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1); b.scrollTop -= Math.ceil((d.scrollTop + b.scrollTop) * 0.1); if ((d.scrollTop + b.scrollTop) == 0) clearInterval(btn.timer, window.onscroll = set); }, 10); }; function set() { btn.style.display = (d.scrollTop + b.scrollTop > 100) ? 'block': "none" }};backTop('goTop');64、原生JavaScript获得URL中GET参数值
// 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"]function get_get(){ querystr = window.location.href.split("?") if(querystr[1]){ GETs = querystr[1].split("&") GET =new Array() for(i=0;i<GETs.length;i++){ tmp_arr = GETs.split("=") key=tmp_arr[0] GET[key] = tmp_arr[1] } } return querystr[1];}65、原生JavaScript实现全选通用方法
function checkall(form, prefix, checkall) { var checkall = checkall ? checkall : 'chkall'; for(var i = 0; i < form.elements.length; i++) { var e = form.elements; if(e.type=="checkbox"){ e.checked = form.elements[checkall].checked; } }}66、原生JavaScript实现全部取消选择通用方法
function uncheckAll(form) { for (var i=0;i<form.elements.length;i++){ var e = form.elements; if (e.name != 'chkall') e.checked=!e.checked; }}67、原生JavaScript实现打开一个窗体通用方法
function openWindow(url,windowName,width,height){ var x = parseInt(screen.width / 2.0) - (width / 2.0); var y = parseInt(screen.height / 2.0) - (height / 2.0); var isMSIE= (navigator.appName == "Microsoft Internet Explorer"); if (isMSIE) { var p = "resizable=1,location=no,scrollbars=no,width="; p = p+width; p = p+",height="; p = p+height; p = p+",left="; p = p+x; p = p+",top="; p = p+y; retval = window.open(url, windowName, p); } else { var win = window.open(url, "ZyiisPopup", "top=" + y + ",left=" + x + ",scrollbars=" + scrollbars + ",dialog=yes,modal=yes,width=" + width + ",height=" + height + ",resizable=no" ); eval("try { win.resizeTo(width, height); } catch(e) { }"); win.focus(); }}68、原生JavaScript判断是否为客户端设备
function client(o){ var b = navigator.userAgent.toLowerCase(); var t = false; if (o == 'isOP'){ t = b.indexOf('opera') > -1; } if (o == 'isIE'){ t = b.indexOf('msie') > -1; } if (o == 'isFF'){ t = b.indexOf('firefox') > -1; } return t;}69、原生JavaScript获取单选按钮的值
function get_radio_value(field){ if(field&&field.length){ for(var i=0;i<field.length;i++){ if(field.checked){ return field.value; } } }else { return ; } }70、原生JavaScript获取复选框的值
function get_checkbox_value(field){ if(field&&field.length){ for(var i=0;i<field.length;i++){ if(field.checked && !field.disabled){ return field.value; } } }else { return; } }71、原生JavaScript判断是否为邮箱
function isEmail(str){ var re=/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/; if (re.test(str) != true) { return false; }else{ return true; } }72、原生JavaScript判断是否有列表中的危险字符
function isValidReg(chars){ var re=/<|>|\[|\]|\{|\}|『|』|※|○|●|◎|§|△|▲|☆|★|◇|◆|□|▼|㊣|﹋|⊕|⊙|〒|ㄅ|ㄆ|ㄇ|ㄈ|ㄉ|ㄊ|ㄋ|ㄌ|ㄍ|ㄎ|ㄏ|ㄐ|ㄑ|ㄒ|ㄓ|ㄔ|ㄕ|ㄖ|ㄗ|ㄘ|ㄙ|ㄚ|ㄛ|ㄜ|ㄝ|ㄞ|ㄟ|ㄢ|ㄣ|ㄤ|ㄥ|ㄦ|ㄧ|ㄨ|ㄩ|■|▄|▆|\*|@|#|\^|\\/; if (re.test( chars) == true) { return false; }else{ return true; } }73、原生JavaScript判断字符串是否大于规定的长度
function isValidLength(chars, len) { if (chars.length < len) { return false; } return true;}74、原生JavaScript判断字符串是为网址不区分大小写
function isValidURL( chars ) { var re=/^([hH][tT]{2}[pP]:\/\/|[hH][tT]{2}[pP][sS]:\/\/)(\S+\.\S+)$/; if (!isNULL(chars)) { chars = jsTrim(chars); if (chars.match(re) == null) return false; else return true; } return false;}75、原生JavaScript判断字符串是否为小数
function isValidDecimal( chars ) { var re=/^\d*\.?\d{1,2}$/; if (chars.match(re) == null) return false; else return true;}76、原生JavaScript判断字符串是否为整数
function isNumber( chars ) { var re=/^\d*$/; if (chars.match(re) == null) return false; else return true;}77、原生JavaScript判断字符串是否为浮点数
function isFloat( str ) { for(i=0;i<str.length;i++) { if ((str.charAt(i)<"0" || str.charAt(i)>"9")&& str.charAt(i) != '.'){ return false; } } return true;}78、原生JavaScript判断字符是否为A-Za-z英文字母
function isLetters( str ){ var re=/^[A-Za-z]+$/; if (str.match(re) == null) return false; else return true;}79、原生JavaScript判断字符串是否邮政编码
function isValidPost( chars ) { var re=/^\d{6}$/; if (chars.match(re) == null) return false; else return true;}81、原生JavaScript用正则表达式提取页面代码中所有网址
var aa = document.documentElement.outerHTML.match(/(url\(|src=|href=)[\"\']*([^\"\'\(\)\<\>\[\] ]+)[\"\'\)]*|(http:\/\/[\w\-\.]+[^\"\'\(\)\<\>\[\] ]+)/ig).join("\r\n").replace(/^(src=|href=|url\()[\"\']*|[\"\'\>\) ]*$/igm,"");alert(aa)83、原生JavaScript用正则表达式清除相同的数组(高效率)
String.prototype.unique=function(){ var x=this.split(/[\r\n]+/); var y=''; for(var i=0;i<x.length;i++){ if(!new RegExp("^"+x.replace(/([^\w])/ig,"\\$1")+"[ DISCUZ_CODE_2 ]quot;,"igm").test(y)){ y+=x+"\r\n" } } return y};89、原生JavaScript实现金额大写转换函数
function transform(tranvalue) { try { var i = 1; var dw2 = new Array("", "万", "亿"); //大单位 var dw1 = new Array("拾", "佰", "仟"); //小单位 var dw = new Array("零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"); //整数部分用 //以下是小写转换成大写显示在合计大写的文本框中 //分离整数与小数 var source = splits(tranvalue); var num = source[0]; var dig = source[1]; //转换整数部分 var k1 = 0; //计小单位 var k2 = 0; //计大单位 var sum = 0; var str = ""; var len = source[0].length; //整数的长度 for (i = 1; i <= len; i++) { var n = source[0].charAt(len - i); //取得某个位数上的数字 var bn = 0; if (len - i - 1 >= 0) { bn = source[0].charAt(len - i - 1); //取得某个位数前一位上的数字 } sum = sum + Number(n); if (sum != 0) { str = dw[Number(n)].concat(str); //取得该数字对应的大写数字，并插入到str字符串的前面 if (n == '0') sum = 0; } if (len - i - 1 >= 0) { //在数字范围内 if (k1 != 3) { //加小单位 if (bn != 0) { str = dw1[k1].concat(str); } k1++; } else { //不加小单位，加大单位 k1 = 0; var temp = str.charAt(0); if (temp == "万" || temp == "亿") //若大单位前没有数字则舍去大单位 str = str.substr(1, str.length - 1); str = dw2[k2].concat(str); sum = 0; } } if (k1 == 3) //小单位到千则大单位进一 { k2++; } } //转换小数部分 var strdig = ""; if (dig != "") { var n = dig.charAt(0); if (n != 0) { strdig += dw[Number(n)] + "角"; //加数字 } var n = dig.charAt(1); if (n != 0) { strdig += dw[Number(n)] + "分"; //加数字 } } str += "元" + strdig; } catch(e) { return "0元"; } return str;}//拆分整数与小数function splits(tranvalue) { var value = new Array('', ''); temp = tranvalue.split("."); for (var i = 0; i < temp.length; i++) { value = temp; } return value;}90、原生JavaScript常用的正则表达式大收集
匹配中文字符的正则表达式： [\u4e00-\u9fa5]匹配双字节字符（包括汉字在内）：[^\x00-\xff]匹配空行的正则表达式：\n[\s| ]*\r匹配 HTML 标记的正则表达式：<(.*)>.*<\/\1>|<(.*) \/>匹配首尾空格的正则表达式：(^\s*)|(\s*$)匹配 IP 地址的正则表达式：/(\d+)\.(\d+)\.(\d+)\.(\d+)/g匹配 Email 地址的正则表达式：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*匹配网址 URL 的正则表达式：http://(/[\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?sql 语句：^(select|drop|delete|create|update|insert).*[ DISCUZ_CODE_39 ]nbsp;非负整数：^\d+[ DISCUZ_CODE_39 ]nbsp;正整数：^[0-9]*[1-9][0-9]*[ DISCUZ_CODE_39 ]nbsp;非正整数：^((-\d+)|(0+))[ DISCUZ_CODE_39 ]nbsp;负整数：^-[0-9]*[1-9][0-9]*[ DISCUZ_CODE_39 ]nbsp;整数：^-?\d+[ DISCUZ_CODE_39 ]nbsp;非负浮点数：^\d+(\.\d+)?[ DISCUZ_CODE_39 ]nbsp;正浮点数：^((0-9)+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))[ DISCUZ_CODE_39 ]nbsp;非正浮点数：^((-\d+\.\d+)?)|(0+(\.0+)?))[ DISCUZ_CODE_39 ]nbsp;英文字符串：^[A-Za-z]+[ DISCUZ_CODE_39 ]nbsp;英文大写串：^[A-Z]+[ DISCUZ_CODE_39 ]nbsp;英文小写串：^[a-z]+[ DISCUZ_CODE_39 ]nbsp;英文字符数字串：^[A-Za-z0-9]+[ DISCUZ_CODE_39 ]nbsp;英数字加下划线串：^\w+[ DISCUZ_CODE_39 ]nbsp;E-mail地址：^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+[ DISCUZ_CODE_39 ]nbsp;URL：^[a-zA-Z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\s*)?$ 或：^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*[ DISCUZ_CODE_39 ]nbsp;邮政编码：^[1-9]\d{5}[ DISCUZ_CODE_39 ]nbsp;电话号码：^((\(\d{2,3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}(\-\d{1,4})?[ DISCUZ_CODE_39 ]nbsp;手机号码：^((\(\d{2,3}\))|(\d{3}\-))?13\d{9}[ DISCUZ_CODE_39 ]nbsp;双字节字符（包括汉字在内）：^\x00-\xff匹配首尾空格：(^\s*)|(\s*$)匹配 HTML 标记：<(.*)>.*<\/\1>|<(.*) \/>匹配空行：\n[\s| ]*\r提取信息中的网络链接：(h|H)(r|R)(e|E)(f|F) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?提取信息中的邮件地址：\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*提取信息中的图片链接：(s|S)(r|R)(c|C) *= *('|")?(\w|\\|\/|\.)+('|"| *|>)?提取信息中的 IP 地址：(\d+)\.(\d+)\.(\d+)\.(\d+)提取信息中的中国手机号码：(86)*0*13\d{9}提取信息中的中国固定电话号码：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{8}提取信息中的中国电话号码（包括移动和固定电话）：(\(\d{3,4}\)|\d{3,4}-|\s)?\d{7,14}提取信息中的中国邮政编码：[1-9]{1}(\d+){5}提取信息中的浮点数（即小数）：(-?\d*)\.?\d+提取信息中的任何数字 ：(-?\d*)(\.\d+)?IP：(\d+)\.(\d+)\.(\d+)\.(\d+)电话区号：^0\d{2,3}$腾讯 QQ 号：^[1-9]*[1-9][0-9]*[ DISCUZ_CODE_39 ]nbsp;帐号（字母开头，允许 5-16 字节，允许字母数字下划线）：^[a-zA-Z][a-zA-Z0-9_]{4,15}[ DISCUZ_CODE_39 ]nbsp;中文、英文、数字及下划线：^[\u4e00-\u9fa5_a-zA-Z0-9]+$91、原生JavaScript实现窗体改变事件resize的操作（兼容所以的浏览器）
(function(){ var fn = function(){ var w = document.documentElement ? document.documentElement.clientWidth : document.body.clientWidth ,r = 1255 ,b = Element.extend(document.body) ,classname = b.className; if(w < r){ //当窗体的宽度小于1255的时候执行相应的操作 }else{ //当窗体的宽度大于1255的时候执行相应的操作 } } if(window.addEventListener){ window.addEventListener('resize', function(){ fn(); }); }else if(window.attachEvent){ window.attachEvent('onresize', function(){ fn(); }); } fn();})();94、原生JavaScript实现base64解码
function base64_decode(data){ var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,ac = 0,dec = "",tmp_arr = []; if (!data) { return data; } data += ''; do { h1 = b64.indexOf(data.charAt(i++)); h2 = b64.indexOf(data.charAt(i++)); h3 = b64.indexOf(data.charAt(i++)); h4 = b64.indexOf(data.charAt(i++)); bits = h1 << 18 | h2 << 12 | h3 << 6 | h4; o1 = bits >> 16 & 0xff; o2 = bits >> 8 & 0xff; o3 = bits & 0xff; if (h3 == 64) { tmp_arr[ac++] = String.fromCharCode(o1); } else if (h4 == 64) { tmp_arr[ac++] = String.fromCharCode(o1, o2); } else { tmp_arr[ac++] = String.fromCharCode(o1, o2, o3); } } while (i < data.length); dec = tmp_arr.join(''); dec = utf8_decode(dec); return dec;}95、原生JavaScript实现utf8解码
function utf8_decode(str_data){ var tmp_arr = [],i = 0,ac = 0,c1 = 0,c2 = 0,c3 = 0;str_data += ''; while (i < str_data.length) { c1 = str_data.charCodeAt(i); if (c1 < 128) { tmp_arr[ac++] = String.fromCharCode(c1); i++; } else if (c1 > 191 && c1 < 224) { c2 = str_data.charCodeAt(i + 1); tmp_arr[ac++] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63)); i += 2; } else { c2 = str_data.charCodeAt(i + 1); c3 = str_data.charCodeAt(i + 2); tmp_arr[ac++] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)); i += 3; } } return tmp_arr.join('');}97、原生JavaScript获取浏览器版本号
function browserVersion(types) { var other = 1; for (i in types) { var v = types ? types : i; if (USERAGENT.indexOf(v) != -1) { var re = new RegExp(v + '(\\/|\\s|: )([\\d\\.]+)', 'ig'); var matches = re.exec(USERAGENT); var ver = matches != null ? matches[2] : 0; other = ver !== 0 && v != 'mozilla' ? 0 : other; } else { var ver = 0; } eval('BROWSER.' + i + '= ver'); } BROWSER.other = other;} 0 0
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