JavaScript 常用方法总结
2015-01-23 15:23
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经常使用的 JS 方法,今天记下,以便以后查询
/* 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,汉子计数为2 */ 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 ""; } /* js 绑定事件 适用于任何浏览器的元素绑定 */ 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); /* 获得当前浏览器JS的版本 */ 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 */ 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(); /* 全选/全不选 */ 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); } } /* js 判断浏览器 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 */ 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"; } } /* 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 */ //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; } } } /* 移除事件 */ 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; } } /* 回车提交 */ $("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) { $("SubmitLogin").onclick(); } } /* JS 执行计时器 */ timeStart = new Date().getTime(); timesEnd = new Date().getTime(); document.getElementById("time").innerHTML = timesEnd - timeStart; /* JS 写Cookie */ function setCookie(name, value, expires, path, domain) { if (!expires) expires = -1; if (!path) path = "/"; var d = "" + name + "=" + value; var e; if (expires < 0) { e = ""; } else if (expires == 0) { var f = new Date(1970, 1, 1); e = ";expires=" + f.toUTCString(); } else { var now = new Date(); var f = new Date(now.getTime() + expires * 1000); e = ";expires=" + f.toUTCString(); } var dm; if (!domain) { dm = ""; } else { dm = ";domain=" + domain; } document.cookie = name + "=" + value + ";path=" + path + e + dm; }; /* JS 读Cookie */ function readCookie(name) { var nameEQ = name + "="; var ca = document.cookie.split(';'); for (var i = 0; i < ca.length; i++) { var c = ca[i]; while (c.charAt(0) == ' ') c = c.substring(1, c.length); if (c.indexOf(nameEQ) == 0) { return decodeURIComponent(c.substring(nameEQ.length, c.length)) } } return null } /* Ajax 请求 */ C.ajax = function(args) { var self = this; this.options = { type: 'GET', async: true, contentType: 'application/x-www-form-urlencoded', url: 'about:blank', data: null, success: {}, error: {} }; this.getXmlHttp = function() { var xmlHttp; try { xmlhttp = new XMLHttpRequest(); } catch (e) { try { xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } } if (!xmlhttp) { alert('您的浏览器不支持AJAX'); return false; } return xmlhttp; }; this.send = function() { C.each(self.options, function(key, val) { self.options[key] = (args[key] == null) ? val : args[key]; }); var xmlHttp = new self.getXmlHttp(); if (self.options.type.toUpperCase() == 'GET') { xmlHttp.open(self.options.type, self.options.url + (self.options.data == null ? "" : ((/[?]$/.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(); }; /* JS StringBuilder 用法 */ 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 */ 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); } /* 清空 LoadJS 加载到顶部的js引用 */ 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); }; /* JS 替换非法字符主要用在密码验证上出现的特殊字符 */ 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 */ 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(); } }; /* 获取当前时间 */ 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 去掉空格方法: */ 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, ""); } /* js 动态移除 head 里的 js 引用 */ 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); }; /* 整个UL 点击事件 加在UL里的onclick里 */ 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(); }; /* 判断浏览器使用的是哪个 JS 版本 */ < script language = "javascript" > var jsversion = 1.0; < /script> <script language="javascript1.1"> jsversion = 1.1; </script > < script language = "javascript1.2" > jsversion = 1.2; < /script> <script language="javascript1.3"> jsversion = 1.3; </script > < script language = "javascript1.4" > jsversion = 1.4; < /script> <script language="javascript1.5"> jsversion = 1.5; </script > < script language = "javascript1.6" > jsversion = 1.6; < /script> <script language="javascript1.7"> jsversion = 1.7; </script > < script language = "javascript1.8" > jsversion = 1.8; < /script> <script language="javascript1.9"> jsversion = 1.9; </script > < script language = "javascript2.0" > jsversion = 2.0; < /script> alert(jsversion);
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