JavaScript判断浏览器版本的方法(2)

function myBrowser(){ var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串 var isOpera = userAgent.indexOf("Opera") > -1; //判断是否Opera浏览器 var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera; //判断是否IE浏览器 var isFF = userAgent.indexOf("Firefox") > -1; //判断是否Firefox浏览器 var isSafari = userAgent.indexOf("Safari") > -1; //判断是否Safari浏览器 if (isIE) { var IE5 = IE55 = IE6 = IE7 = IE8 = false; var verIE = new RegExp("MSIE (\\d+\\.\\d+);"); verIE.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"; } }//isIE end if (isFF) { return "FF"; } if (isOpera) { return "Opera"; } } //以下是调用上面的函数 var nowBrowser = myBrowser() if (nowBrowser == "FF") { alert("Firefox"); } if (nowBrowser == "Opera") { alert("Opera"); } if (nowBrowser == "Safari") { alert("Safari"); } if (nowBrowser == "IE55") { alert("IE5.5"); } if (nowBrowser == "IE6") { alert("IE6"); } if (nowBrowser == "IE7") { alert("IE7"); } if (nowBrowser == "IE8") { alert("IE8"); }