JavaScript常用的代码片段
来源：互联网 发布：coc黑水罐升级数据 编辑：程序博客网 时间：2024/04/28 05:13
原文链接 http://blog.poetries.top/2016/10/27/JavaScript-code-snippets
- 转义特殊字符为html实体
HtmlEncode: function(str){ return str.replace(/&/g, '&').replace(/\"/g, '"').replace(/</g, '<').replace(/>/g, '>').replace(/'/g, '''); },- 验证是否为有效的手机电话号码
IsMobile: function(str){ var rp = /^1[3|4|5|7|8][0-9]\d{4,8}$/; return rp.test(str); },- 验证是否为有效的座机电话号码
IsTel: function(str){ var rp = /^([0-9]{3,4}-)?[0-9]{7,8}$/; return rp.test(str); },- 判断是那种类型的浏览器
WhichBrowser: function(){ var userAgent = navigator.userAgent; var isOpera = userAgent.indexOf("Opera") > -1; var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera; var isFF = userAgent.indexOf("Firefox") > -1; var isCH = userAgent.indexOf("Chrome") > -1; var isSafari = userAgent.indexOf("Safari") > -1; if (isIE){ var IE5 = IE55 = IE6 = IE7 = IE8 = false; var reIE = new RegExp("MSIE (\\d+\\.\\d+);"); reIE.test(userAgent); var fIEVersion = parseFloat(RegExp["$1"]); IE55 = fIEVersion == 5.5; IE6 = fIEVersion == 6.0; IE7 = fIEVersion == 7.0; IE8 = fIEVersion == 8.0; if (IE55) { return "IE55"; } if (IE6) { return "IE6"; } if (IE7) { return "IE7"; } if (IE8) { return "IE8"; } } if (isFF) { return "Firefox"; } if (isCH) { return "Chrome"; } if (isOpera) { return "Opera"; } if (isSafari) { return "Safari"; } }, ```- 获取客户端浏览器cookie```javascript GetCookie: function(c_name){ if(document.cookie.length>0){ c_start = document.cookie.indexOf(c_name + '='); if(c_start != -1){ c_start = c_start + c_name.length + 1; c_end = document.cookie.indexOf(';',c_start); if (c_end==-1) c_end = document.cookie.length; return unescape(document.cookie.substring(c_start,c_end)); } } return ''; },<div class="se-preview-section-delimiter"></div>- 设置客户端浏览器cookie
SetCookie: function(c_name, value, expiredays){ var exdate = new Date(); exdate.setDate(exdate.getDate() + expiredays); document.cookie = c_name + "=" + escape(value) + ((expiredays==null) ? "" : ";expires="+exdate.toGMTString()); },};<div class="se-preview-section-delimiter"></div>- 字符串长度截取
function cutstr(str, len) { var temp, icount = 0, patrn = /[^\x00-\xff]/， strre = ""; for (var i = 0; i < str.length; i++) { if (icount < len - 1) { temp = str.substr(i, 1); if (patrn.exec(temp) == null) { icount = icount + 1 } else { icount = icount + 2 } strre += temp } else { break; } } return strre + "..."}<div class="se-preview-section-delimiter"></div>- 替换全部
String.prototype.replaceAll = function(s1, s2) { return this.replace(new RegExp(s1, "gm"), s2)}<div class="se-preview-section-delimiter"></div>- 清除空格
String.prototype.trim = function() { var reExtraSpace = /^\s*(.*?)\s+$/; return this.replace(reExtraSpace, "$1")}<div class="se-preview-section-delimiter"></div>- 清除左空格/右空格
function ltrim(s){ return s.replace( /^(\s*| *)/, ""); } function rtrim(s){ return s.replace( /(\s*| *)$/, ""); }<div class="se-preview-section-delimiter"></div>- 判断是否以某个字符串开头
String.prototype.startWith = function (s) { return this.indexOf(s) == 0}<div class="se-preview-section-delimiter"></div>- 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)}<div class="se-preview-section-delimiter"></div>- 转义html标签
function HtmlEncode(text) { return text.replace(/&/g, '&').replace(/\"/g, '"').replace(/</g, '<').replace(/>/g, '>')}<div class="se-preview-section-delimiter"></div>- 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}<div class="se-preview-section-delimiter"></div>- 判断是否为数字类型
function isDigit(value) { var patrn = /^[0-9]*$/; if (patrn.exec(value) == null || value == "") { return false } else { return true }}<div class="se-preview-section-delimiter"></div>- 设置cookie值
function setCookie(name, value, Hours) { var d = new Date(); var offset = 8; var utc = d.getTime() + (d.getTimezoneOffset() * 60000); var nd = utc + (3600000 * offset); var exp = new Date(nd); exp.setTime(exp.getTime() + Hours * 60 * 60 * 1000); document.cookie = name + "=" + escape(value) + ";path=/;expires=" + exp.toGMTString() + ";domain=360doc.com;"}<div class="se-preview-section-delimiter"></div>- 获取cookie值
function getCookie(name) { var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)")); if (arr != null) return unescape(arr[2]); return null}<div class="se-preview-section-delimiter"></div>- 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") } }}<div class="se-preview-section-delimiter"></div>- 设为首页
function setHomepage() { if (document.all) { document.body.style.behavior = 'url(#default#homepage)'; document.body.setHomePage('http://w3cboy.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://w3cboy.com') }}<div class="se-preview-section-delimiter"></div>- 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) }}<div class="se-preview-section-delimiter"></div>- 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;}<div class="se-preview-section-delimiter"></div>- 清除脚本内容
function stripscript(s) { return s.replace(/<script.*?>.*?<\/script>/ig, '');}<div class="se-preview-section-delimiter"></div>- 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) {}}<div class="se-preview-section-delimiter"></div>- 返回按ID检索的元素对象
function $(id) { return !id ? null : document.getElementById(id);}<div class="se-preview-section-delimiter"></div>- 跨浏览器绑定事件
function addEventSamp(obj,evt,fn){ if(!oTarget){return;} if (obj.addEventListener) { obj.addEventListener(evt, fn, false); }else if(obj.attachEvent){ obj.attachEvent('on'+evt,fn); }else{ oTarget["on" + sEvtType] = fn; } }<div class="se-preview-section-delimiter"></div>- 跨浏览器删除事件
function delEvt(obj,evt,fn){ if(!obj){return;} if(obj.addEventListener){ obj.addEventListener(evt,fn,false); }else if(oTarget.attachEvent){ obj.attachEvent("on" + evt,fn); }else{ obj["on" + evt] = fn; }}<div class="se-preview-section-delimiter"></div>- 为元素添加on方法
Element.prototype.on = Element.prototype.addEventListener;NodeList.prototype.on = function (event, fn) {、 []['forEach'].call(this, function (el) { el.on(event, fn); }); return this;};<div class="se-preview-section-delimiter"></div>- 为元素添加trigger方法
Element.prototype.trigger = function (type, data) { var event = document.createEvent('HTMLEvents'); event.initEvent(type, true, true); event.data = data || {}; event.eventName = type; event.target = this; this.dispatchEvent(event); return this;};NodeList.prototype.trigger = function (event) { []['forEach'].call(this, function (el) { el['trigger'](event); }); return this;};<div class="se-preview-section-delimiter"></div>- 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); } }}<div class="se-preview-section-delimiter"></div>- 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;}<div class="se-preview-section-delimiter"></div>- 压缩CSS样式代码
function compressCss (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];}<div class="se-preview-section-delimiter"></div>- 获取当前路径
var currentPageUrl = "";if (typeof this.href === "undefined") { currentPageUrl = document.location.toString().toLowerCase();}else { currentPageUrl = this.href.toString().toLowerCase();}<div class="se-preview-section-delimiter"></div>- 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;}<div class="se-preview-section-delimiter"></div>- 判断是否移动设备访问
function isMobileUserAgent(){ return (/iphone|ipod|android.*mobile|windows.*phone|blackberry.*mobile/i.test(window.navigator.userAgent.toLowerCase()));}<div class="se-preview-section-delimiter"></div>- 判断是否苹果移动设备访问
function isAppleMobileDevice(){ return (/iphone|ipod|ipad|Macintosh/i.test(navigator.userAgent.toLowerCase()));}<div class="se-preview-section-delimiter"></div>- 判断是否安卓移动设备访问
function isAndroidMobileDevice(){ return (/android/i.test(navigator.userAgent.toLowerCase()));}<div class="se-preview-section-delimiter"></div>- 判断是否Touch屏幕
function isTouchScreen(){ return (('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch);}<div class="se-preview-section-delimiter"></div>- 判断是否打开视窗
function isViewportOpen() { return !!document.getElementById('wixMobileViewport');}<div class="se-preview-section-delimiter"></div>- 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;}<div class="se-preview-section-delimiter"></div>- 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; }}<div class="se-preview-section-delimiter"></div>- 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;}<div class="se-preview-section-delimiter"></div>- 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; }}<div class="se-preview-section-delimiter"></div>- 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);}<div class="se-preview-section-delimiter"></div>- 获取页面scrollLeft
function getPageScrollLeft(){ var a = document; return a.documentElement.scrollLeft || a.body.scrollLeft;}<div class="se-preview-section-delimiter"></div>- 获取页面可视宽度
function getPageViewWidth(){ var d = document, a = d.compatMode == "BackCompat" ? d.body : d.documentElement; return a.clientWidth;}<div class="se-preview-section-delimiter"></div>- 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);}<div class="se-preview-section-delimiter"></div>- 获取页面scrollTop
function getPageScrollTop(){ var a = document; return a.documentElement.scrollTop || a.body.scrollTop;}<div class="se-preview-section-delimiter"></div>- 获取页面可视高度
function getPageViewHeight() { var d = document, a = d.compatMode == "BackCompat" ? d.body : d.documentElement; return a.clientHeight;}<div class="se-preview-section-delimiter"></div>- 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;}<div class="se-preview-section-delimiter"></div>- 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());}<div class="se-preview-section-delimiter"></div>- 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(""); }<div class="se-preview-section-delimiter"></div>- 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;}<div class="se-preview-section-delimiter"></div>- 日期格式化函数+调用方法
Date.prototype.format = function(format){ 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.$1.length==1 ? o[k] :("00"+ o[k]).substr((""+ o[k]).length)); } return format;}alert(new Date().format("yyyy-MM-dd hh:mm:ss"));<div class="se-preview-section-delimiter"></div>- 常用的正则表达式
//正整数/^[0-9]*[1-9][0-9]*$/;//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-]+)+$/;//url地址/^[a-zA-z]+://(\w+(-\w+)*)(\.(\w+(-\w+)*))*(\?\S*)?$/;或：^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$ //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*$/;//匹配HTML标记的正则表达式< (\S*?)[^>]*>.*?|< .*? />;//sql 语句^(select|drop|delete|create|update|insert).*$//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+)//取信息中的中国手机号码(86)*0*13\d{9} //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+)?//电话区号^0\d{2,3}$//腾讯 QQ 号^[1-9]*[1-9][0-9]*$ //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}$ //中文、英文、数字及下划线^[\u4e00-\u9fa5_a-zA-Z0-9]+$<div class="se-preview-section-delimiter"></div>- 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');<div class="se-preview-section-delimiter"></div>- 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 = []; for(i=0;i<GETs.length;i++){ tmp_arr = GETs.split("=") key=tmp_arr[0] GET[key] = tmp_arr[1] } } return querystr[1];}<div class="se-preview-section-delimiter"></div>- 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(); }}<div class="se-preview-section-delimiter"></div>- 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);<div class="se-preview-section-delimiter"></div>- 清除相同的数组
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")+"$","igm").test(y)){ y+=x+"\r\n" } } return y};<div class="se-preview-section-delimiter"></div>- 按字母排序，对每行进行数组排序
function SetSort(){ var text=K1.value.split(/[\r\n]/).sort().join("\r\n");//顺序 var test=K1.value.split(/[\r\n]/).sort().reverse().join("\r\n");//反序 K1.value=K1.value!=text?text:test;}<div class="se-preview-section-delimiter"></div>- 清除html代码中的脚本
function clear_script(){ 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,"");}动态执行JavaScript脚本function javascript(){ try{ eval(K1.value); }catch(e){ alert(e.message); }}<div class="se-preview-section-delimiter"></div>- 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;}<div class="se-preview-section-delimiter"></div>- 获取窗体可见范围的宽与高
function getViewSize(){ var de=document.documentElement; var db=document.body; var viewW=de.clientWidth==0 ? db.clientWidth : de.clientWidth; var viewH=de.clientHeight==0 ? db.clientHeight : de.clientHeight; return Array(viewW ,viewH);}- 本文mardown文件
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