摘要:转自攻城狮常用方法总结手机类型判断返回字符串长度,汉字计数为按照预期计数增加获取中的参数绑定事件适用于任何浏览器的元素绑定获得当前浏览器的版本获取当前点击事件的对象如果是字符串截取方法弹出新窗口全屏模拟提交打开新页面全选全不选判断浏览器判
转自 攻城狮-JavaScript 常用方法总结
手机类型判断var BrowserInfo = { userAgent: navigator.userAgent.toLowerCase() isAndroid: Boolean(navigator.userAgent.match(/android/ig)), isIphone: Boolean(navigator.userAgent.match(/iphone|ipod/ig)), isIpad: Boolean(navigator.userAgent.match(/ipad/ig)), isWeixin: Boolean(navigator.userAgent.match(/MicroMessenger/ig)), }返回字符串长度,汉字计数为2
js 绑定事件 适用于任何浏览器的元素绑定
function strLength(str) { var a = 0; for (var i = 0; i < str.length; i++) { if (str.charCodeAt(i) > 255) a += 2;//按照预期计数增加2 else a++; } return a; } 获取url中的参数 function GetQueryStringRegExp(name,url) { var reg = new RegExp("(^|?|&)" + name + "=([^&]*)(s|&|$)", "i"); if (reg.test(url)) return decodeURIComponent(RegExp.$2.replace(/+/g, " ")); return ""; }
获得当前浏览器JS的版本
function eventBind(obj, eventType, callBack) { if (obj.addEventListener) { obj.addEventListener(eventType, callBack, false); } else if (window.attachEvent) { obj.attachEvent("on" + eventType, callBack); } else { obj["on" + eventType] = callBack; } }; eventBind(document, "click", bodyClick);
function getjsversion(){ var n = navigator; var u = n.userAgent; var apn = n.appName; var v = n.appVersion; var ie = v.indexOf("MSIE "); if (ie > 0){ apv = parseInt(i = v.substring(ie + 5)); if (apv > 3) { apv = parseFloat(i); } } else { apv = parseFloat(v); } var isie = (apn == "Microsoft Internet Explorer"); var ismac = (u.indexOf("Mac") >= 0); var javascriptVersion = "1.0"; if (String && String.prototype) { javascriptVersion = "1.1"; if (javascriptVersion.match) { javascriptVersion = "1.2"; var tm = new Date; if (tm.setUTCDate) { javascriptVersion = "1.3"; if (isie && ismac && apv >= 5) javascriptVersion = "1.4"; var pn = 0; if (pn.toPrecision) { javascriptVersion = "1.5"; a = new Array; if (a.forEach) { javascriptVersion = "1.6"; i = 0; o = new Object; tcf = new Function("o", "var e,i=0;try{i=new Iterator(o)}catch(e){}return i"); i = tcf(o); if (i && i.next) { javascriptVersion = "1.7"; } } } } } } return javascriptVersion; }获取当前点击事件的Object对象
function getEvent() { if (document.all) { return window.event; //如果是ie } func = getEvent.caller; while (func != null) { var arg0 = func.arguments[0]; if (arg0) { if ((arg0.constructor == Event || arg0.constructor == MouseEvent) || (typeof (arg0) == "object" && arg0.preventDefault && arg0.stopPropagation)) { return arg0; } } func = func.caller; } return null; };字符串截取方法
getCharactersLen: function (charStr, cutCount) { if (charStr == null || charStr == "") return ""; var totalCount = 0; var newStr = ""; for (var i = 0; i < charStr.length; i++) { var c = charStr.charCodeAt(i); if (c < 255 && c > 0) { totalCount++; } else { totalCount += 2; } if (totalCount >= cutCount) { newStr += charStr.charAt(i); break; } else { newStr += charStr.charAt(i); } } return newStr; }JS 弹出新窗口全屏
全选/全不选
var tmp = window.open("about:blank", "", "fullscreen=1") tmp.moveTo(0, 0); tmp.resizeTo(screen.width + 20, screen.height); tmp.focus(); tmp.location.href = "http://www.che168.com/pinggu/eva_" + msgResult.message[0] + ".html"; var config_ = "left=0,top=0,width=" + (window.screen.Width) + ",height=" + (window.screen.Height); window.open("http://www.che168.com/pinggu/eva_" + msgResult.message[0] + ".html", "winHanle", config_); //模拟form提交打开新页面 var f = document.createElement("form"); f.setAttribute("action", "http://www.che168.com/pinggu/eva_" + msgResult.message[0] + ".html"); f.target = "_blank"; document.body.appendChild(f); f.submit();
js 判断浏览器
function selectAll(objSelect) { if (objSelect.checked == true) { $("input[name="chkId"]").attr("checked", true); $("input[name="chkAll"]").attr("checked", true); } else if (objSelect.checked == false) { $("input[name="chkId"]").attr("checked", false); $("input[name="chkAll"]").attr("checked", false); } }
判断是否是 IE 浏览器 if (document.all){ alert(”IE浏览器”); }else{ alert(”非IE浏览器”); } if (!!window.ActiveXObject){ alert(”IE浏览器”); }else{ alert(”非IE浏览器”); } 判断是IE几 var isIE=!!window.ActiveXObject; var isIE6=isIE&&!window.XMLHttpRequest; var isIE8=isIE&&!!document.documentMode; var isIE7=isIE&&!isIE6&&!isIE8; if (isIE){ if (isIE6){ alert(”ie6″); }else if (isIE8){ alert(”ie8″); }else if (isIE7){ alert(”ie7″); } }判断浏览器
JS判断两个日期大小 适合 2012-09-09 与2012-9-9 两种格式的对比
function getOs() { if (navigator.userAgent.indexOf("MSIE 8.0") > 0) { return "MSIE8"; } else if (navigator.userAgent.indexOf("MSIE 6.0") > 0) { return "MSIE6"; } else if (navigator.userAgent.indexOf("MSIE 7.0") > 0) { return "MSIE7"; } else if (isFirefox = navigator.userAgent.indexOf("Firefox") > 0) { return "Firefox"; } if (navigator.userAgent.indexOf("Chrome") > 0) { return "Chrome"; } else { return "Other"; } }
移除事件
11 12 13 //得到日期值并转化成日期格式,replace(/-/g, "/")是根据验证表达式把日期转化成长日期格式,这样再进行判断就好判断了 function ValidateDate() { var beginDate = $("#t_datestart").val(); var endDate = $("#t_dateend").val(); if (beginDate.length > 0 && endDate.length>0) { var sDate = new Date(beginDate.replace(/-/g, "/")); var eDate= new Date(endDate.replace(/-/g, "/")); if (sDate > eDate) { alert("开始日期要小于结束日期"); return false; } } }
回车提交
this.moveBind = function (objId, eventType, callBack) { var obj = document.getElementById(objId); if (obj.removeEventListener) { obj.removeEventListener(eventType, callBack, false); } else if (window.detachEvent) { obj.detachEvent("on" + eventType, callBack); } else { obj["on" + eventType] = null; } }
JS 执行计时器
$("id").onkeypress = function (event) { event = (event) ? event : ((window.event) ? window.event : "") keyCode = event.keyCode ? event.keyCode : (event.which ? event.which : event.charCode); if (keyCode == 13) { $("SubmitLogin").onclick(); } }
timeStart = new Date().getTime(); timesEnd = new Date().getTime(); document.getElementById("time").innerHTML = timesEnd - timeStart;JS 写Cookie
JS 读Cookie
function setCookie(name, value, expires, path, domain) { if (!expires) expires = -1; if (!path) path = "/"; var d = "" + name + "=" + value; var e; if (expires < 0) { e = ""; } else if (expires == 0) { var f = new Date(1970, 1, 1); e = ";expires=" + f.toUTCString(); } else { var now = new Date(); var f = new Date(now.getTime() + expires * 1000); e = ";expires=" + f.toUTCString(); } var dm; if (!domain) { dm = ""; } else { dm = ";domain=" + domain; } document.cookie = name + "=" + value + ";path=" + path + e + dm; };
Ajax 请求
function readCookie(name) { var nameEQ = name + "="; var ca = document.cookie.split(";"); for (var i = 0; i < ca.length; i++) { var c = ca[i]; while (c.charAt(0) == " ") c = c.substring(1, c.length); if (c.indexOf(nameEQ) == 0) { return decodeURIComponent(c.substring(nameEQ.length, c.length)) } } return null }
JS StringBuilder 用法
C.ajax = function (args) { var self = this; this.options = { type: "GET", async: true, contentType: "application/x-www-form-urlencoded", url: "about:blank", data: null, success: {}, error: {} }; this.getXmlHttp = function () { var xmlHttp; try { xmlhttp = new XMLHttpRequest(); } catch (e) { try { xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } } if (!xmlhttp) { alert("您的浏览器不支持AJAX"); return false; } return xmlhttp; }; this.send = function () { C.each(self.options, function (key, val) { self.options[key] = (args[key] == null) ? val : args[key]; }); var xmlHttp = new self.getXmlHttp(); if (self.options.type.toUpperCase() == "GET") { xmlHttp.open(self.options.type, self.options.url + (self.options.data == null ? "" : ((/[?]$/.test(self.options.url) ? "&" : "?") + self.options.data)), self.options.async); } else { xmlHttp.open(self.options.type, self.options.url, self.options.async); xmlHttp.setRequestHeader("Content-Length", self.options.data.length); } xmlHttp.setRequestHeader("Content-Type", self.options.contentType); xmlHttp.onreadystatechange = function () { if (xmlHttp.readyState == 4) { if (xmlHttp.status == 200 || xmlHttp.status == 0) { if (typeof self.options.success == "function") self.options.success(xmlHttp.responseText); xmlHttp = null; } else { if (typeof self.options.error == "function") self.options.error("Server Status: " + xmlHttp.status); } } }; xmlHttp.send(self.options.type.toUpperCase() == "POST" ? self.options.data.toString() : null); }; this.send(); };
function StringBuilder() { this.strings = new Array; }; StringBuilder.prototype.append = function (str) { this.strings.push(str); }; StringBuilder.prototype.toString = function () { return this.strings.join(""); };JS 加载到顶部LoadJS
清空 LoadJS 加载到顶部的js引用
function loadJS (url, fn) { var ss = document.getElementsByName("script"), loaded = false; for (var i = 0, len = ss.length; i < len; i++) { if (ss[i].src && ss[i].getAttribute("src") == url) { loaded = true; break; } } if (loaded) { if (fn && typeof fn != "undefined" && fn instanceof Function) fn(); return false; } var s = document.createElement("script"), b = false; s.setAttribute("type", "text/javascript"); s.setAttribute("src", url); s.onload = s.onreadystatechange = function () { if (!b && (!this.readyState || this.readyState == "loaded" || this.readyState == "complete")) { b = true; if (fn && typeof fn != "undefined" && fn instanceof Function) fn(); } }; document.getElementsByTagName("head")[0].appendChild(s); }, bind: function (objId, eventType, callBack) { //适用于任何浏览器的绑定 var obj = document.getElementById(objId); if (obj.addEventListener) { obj.addEventListener(eventType, callBack, false); } else if (window.attachEvent) { obj.attachEvent("on" + eventType, callBack); } else { obj["on" + eventType] = callBack; } } function JSLoad (args) { s = document.createElement("script"); s.setAttribute("type", "text/javascript"); s.setAttribute("src", args.url); s.onload = s.onreadystatechange = function () { if (!s.readyState || s.readyState == "loaded" || s.readyState == "complete") { if (typeof args.callback == "function") args.callback(this, args); s.onload = s.onreadystatechange = null; try { s.parentNode && s.parentNode.removeChild(s); } catch (e) { } } }; document.getElementsByTagName("head")[0].appendChild(s); }
JS 替换非法字符主要用在密码验证上出现的特殊字符
function ClearHeadJs (src) { var js = document.getElementsByTagName("head")[0].children; var obj = null; for (var i = 0; i < js.length; i++) { if (js[i].tagName.toLowerCase() == "script" && js[i].attributes["src"].value.indexOf(src) > 0) { obj = js[i]; } } document.getElementsByTagName("head")[0].removeChild(obj); };
function URLencode(sStr) { return escape(sStr).replace(/+/g, "%2B").replace(/"/g, "%22").replace(/"/g, "%27").replace(///g, "%2F"); };按Ctrl + Entert 直接提交表单
获取当前时间
document.body.onkeydown = function (evt) { evt = evt ? evt : (window.event ? window.event : null); if (13 == evt.keyCode && evt.ctrlKey) { evt.returnValue = false; evt.cancel = true; PostData(); } };
Js 去掉空格方法:
function GetCurrentDate() { var d = new Date(); var y = d.getYear()+1900; month = add_zero(d.getMonth() + 1), days = add_zero(d.getDate()), hours = add_zero(d.getHours()); minutes = add_zero(d.getMinutes()), seconds = add_zero(d.getSeconds()); var str = y + "-" + month + "-" + days + " " + hours + ":" + minutes + ":" + seconds; return str; }; function add_zero(temp) { if (temp < 10) return "0" + temp; else return temp; }
js 动态移除 head 里的 js 引用
String.prototype.Trim = function() { return this.replace(/(^s*)|(s*$)/g, ""); } String.prototype.LTrim = function() {return this.replace(/(^s*)/g, "");} String.prototype.RTrim = function() {return this.replace(/(s*$)/g, "");}
整个UL 点击事件 加在UL里的onclick里
this.ClearHeadJs = function (src) { var js = document.getElementsByTagName("head")[0].children; var obj = null; for (var i = 0; i < js.length; i++) { if (js[i].tagName.toLowerCase() == "script" && js[i].attributes["src"].value.indexOf(src) > 0) { obj = js[i]; } } document.getElementsByTagName("head")[0].removeChild(obj); };
判断浏览器使用的是哪个 JS 版本
function CreateFrom(url, params) { var f = document.createElement("form"); f.setAttribute("action", url); for (var i = 0; i < params.length; i++) { var input = document.createElement("input"); input.setAttribute("type", "hidden"); input.setAttribute("name", params[i].paramName); input.setAttribute("value", params[i].paramValue); f.appendChild(input); } f.target = "_blank"; document.body.appendChild(f); f.submit(); };
alert(jsversion);
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