（大家来试试）最简洁的浏览器判断语句


var sUserAgent = navigator.userAgent;
var fAppVersion = parseFloat(navigator.appVersion);
//比较浏览器版本大小
function compareVersions(sVersion1,sVersion2){
var aVersion1 = sVersion1.split(".");
var aVersion2 = sVersion2.split("."); if(aVersion1.length>aVersion2.length){
for(var i=0;i<aVersion1.length;i++)
aVersion2.push("0");
}else if(aVersion1.length<aVersion2.length){
for(var i=0;i<aVersion2.length;i++)
aVersion1.push("0");
} for(var i=0;i<aVersion1.length;i++){
if(aVersion1[i]<aVersion2[i])
return -1;
else if(aVersion1[i]>aVersion2[i])
return 1;
}
return 0;
}
//检测是否Opera浏览器(判断是否IE需要排除这个可能)
var isOpera = sUserAgent.indexOf("Opera")>-1;
//检测是否Safari(判断是否FF需要排除这个可能)
var isKHTML = sUserAgent.indexOf("KHTML")>-1
|| sUserAgent.indexOf("Konqueror")>-1
|| sUserAgent.indexOf("AppleWebKit")>-1;
//检测IE
var isIE = sUserAgent.indexOf("compatible") > -1
&&sUserAgent.indexOf("MSIE") > -1
&&!isOpera;var isMinIE4 = isMinIE5 = isMinIE5_5 = isMinIE6 = isMinIE7 = false;
if(isIE){
var reIE = new RegExp("MSIE (\\d+\\.\\d+);");
reIE.test(sUserAgent);
var fIEVersion = parseFloat(RegExp["$1"]);

isMinIE4 = fIEVersion >=4;
isMinIE5 =  fIEVersion >=5;
isMinIE5_5 = fIEVersion >=5.5;
isMinIE6 = fIEVersion >=6;
isMinIE7 = fIEVersion >=7;
}
//检测Firfox
var isFF = sUserAgent.indexOf("Firefox")>-1&&!isKHTML;
var isMinFF1 = isMinFF2 =isMinFF3 = false;
if(isFF){
var reFF = new RegExp("Firefox\\/(\\d+\\.\\d+(?:\\.\\d+\\.\\d+)?)");
reFF.test(sUserAgent);
isMinFF1 = compareVersions(RegExp["$1"],"1.0") >=0;
isMinFF2 = compareVersions(RegExp["$1"],"2.0") >=0;
isMinFF3 = compareVersions(RegExp["$1"],"3.0") >=0;
}

解决方案 »

  1.   

    function Brower(){
    }
    Brower.prototype.getBrowerInfo =function(){
     var reg;
     if(document.all){
      this.isIE=true;
      reg=/MSIE ([^;]+)/
     }
     else{
      this.isFF=true;
      reg=/Firefox\/(\d+)/
     }
     var m=reg.exec(navigator.userAgent) this.version=parseInt(m[1]);
    }
    Brower.prototype.toString=function(){
      return "浏览器\t"+(this.isIE?"IE":"Firefox")+"\n版　本\t"+this.version;
    }var b=new Brower();
    b.getBrowerInfo();
    alert(b)
      

  2.   

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <script type="text/javascript">
    function browserinfo(){
            var Browser_Name=navigator.appName;
            var Browser_Version=parseFloat(navigator.appVersion);
            var Browser_Agent=navigator.userAgent;
            var Actual_Version,Actual_Name;
            var is_IE=(Browser_Name=="Microsoft Internet Explorer");//判读是否为ie浏览器
            var is_NN=(Browser_Name=="Netscape");//判断是否为netscape浏览器
      var is_op=(Browser_Name=="Opera");//判断是否为Opera浏览器
                    if(is_NN){
                //upper 5.0 need to be process,lower 5.0 return directly
                if(Browser_Version>=5.0){
       if(Browser_Agent.indexOf("Netscape")!=-1){
            var Split_Sign=Browser_Agent.lastIndexOf("/");
                     var Version=Browser_Agent.lastIndexOf(" ");
         var Bname=Browser_Agent.substring(0,Split_Sign);
         var Split_sign2=Bname.lastIndexOf(" ");
                     Actual_Version=Browser_Agent.substring(Split_Sign+1,Browser_Agent.length);
                     Actual_Name=Bname.substring(Split_sign2+1,Bname.length);
       
       }
       if(Browser_Agent.indexOf("Firefox")!=-1){
            var Split_Sign=Browser_Agent.lastIndexOf("/");
                     var Version=Browser_Agent.lastIndexOf(" ");
                     Actual_Version=Browser_Agent.substring(Split_Sign+1,Browser_Agent.length);
                     Actual_Name=Browser_Agent.substring(Version+1,Split_Sign);
       
       }
       if(Browser_Agent.indexOf("Safari")!=-1){
       if(Browser_Agent.indexOf("Chrome")!=-1){
       var Split_Sign=Browser_Agent.lastIndexOf(" ");
                    var Version=Browser_Agent.substring(0,Split_Sign);;
                 var Split_Sign2=Version.lastIndexOf("/");
                    var Bname=Version.lastIndexOf(" ");
                     Actual_Version=Version.substring(Split_Sign2+1,Version.length);
                     Actual_Name=Version.substring(Bname+1,Split_Sign2);
       }
       else{
           var Split_Sign=Browser_Agent.lastIndexOf("/");
                    var Version=Browser_Agent.substring(0,Split_Sign);;
                 var Split_Sign2=Version.lastIndexOf("/");
                    var Bname=Browser_Agent.lastIndexOf(" ");
                     Actual_Version=Browser_Agent.substring(Split_Sign2+1,Bname);
                     Actual_Name=Browser_Agent.substring(Bname+1,Split_Sign);
       
       }
       }
                  
         
         
                 }
                else{
                     Actual_Version=Browser_Version;
                     Actual_Name=Browser_Name;
                 }
             }
            else if(is_IE){
                var Version_Start=Browser_Agent.indexOf("MSIE");
                var Version_End=Browser_Agent.indexOf(";",Version_Start);
                 Actual_Version=Browser_Agent.substring(Version_Start+5,Version_End)
                 Actual_Name=Browser_Name;
                
                if(Browser_Agent.indexOf("Maxthon")!=-1||Browser_Agent.indexOf("MAXTHON")!=-1){
       var mv=Browser_Agent.lastIndexOf(" ");
       var mv1=Browser_Agent.substring(mv,Browser_Agent.length-1);
                mv1="遨游版本:"+mv1;
            Actual_Name+="(Maxthon)";
         Actual_Version+=mv1;
                 }
                
             }
       else if(Browser_Agent.indexOf("Opera")!=-1){
                     Actual_Name="Opera";
                    var tempstart=Browser_Agent.indexOf("Opera");
                    var tempend=Browser_Agent.length;
                     Actual_Version=Browser_Version;
                 }
            else{
                 Actual_Name="Unknown Navigator"
                 Actual_Version="Unknown Version"
             }
            /*------------------------------------------------------------------------------
             --Your Can Create new properties of navigator(Acutal_Name and Actual_Version) --
             --Userage:                                                                     --
             --1,Call This Function.                                                        --
             --2,use the property Like This:navigator.Actual_Name/navigator.Actual_Version;--
             ------------------------------------------------------------------------------*/
             navigator.Actual_Name=Actual_Name;
             navigator.Actual_Version=Actual_Version;
            
            /*---------------------------------------------------------------------------
             --Or Made this a Class.                                                     --
             --Userage:                                                                  --
             --1,Create a instance of this object like this:var browser=new browserinfo;--
             --2,user this instance:browser.Version/browser.Name;                        --
             ---------------------------------------------------------------------------*/
            this.Name=Actual_Name;
            this.Version=Actual_Version;
         }
       browserinfo();
     
        document.write("你使用的浏览器是:"+navigator.userAgent);
     document.write("<br>");
         document.write("你使用的浏览器是:"+navigator.Actual_Name+",版本号:"+navigator.Actual_Version);</script>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
    <title>无标题文档</title>
    </head>
    <body></body>
    </html>
      

  3.   

    有感于showbo代码：<script>
        if(document.all) flag ="ie" + parseInt(/MSIE ([^;]+)/.exec(navigator.userAgent)[1]); //flag:ie+版本号
    switch(flag){
        case "ie6":
        //执行Ie6代码
    break
        case "ie7":
        //执行Ie6代码
    break
    default:
        //执行FF代码
    break
    }
    </script>
      

  4.   


    var version=["MSIE 6","MSIE 7","MSIE 8","Firefox/2","Firefox/3"];
    for(var i=0;i<version.length;i++)
    {
         if(navigator.userAgent.indexOf(version[i])>=0)
            alert(version[i]);
    } 
      

  5.   

    粗略的写了下，有些浏览器没有安装没法测试了
    <script type="text/javascript">
    var sUsrAgent=navigator.userAgent;
    var isIE=sUsrAgent.indexOf("MSIE")!=-1;
    var isIE6=isIE&&sUsrAgent.indexOf("MSIE 6.0")!=-1;
    var isIE7=isIE&&sUsrAgent.indexOf("MSIE 7.0")!=-1;
    var isFF=sUsrAgent.indexOf("Firefox")!=-1;
    var isOP=sUsrAgent.indexOf("Opera")!=-1;
    var isSF=sUsrAgent.indexOf("Safari")!=-1
             &&sUsrAgent.indexOf("Chrome")==-1;
    var isCH=sUsrAgent.indexOf("Chrome")!=-1;alert("isIE="+isIE+"\n"
         +"isIE6="+isIE6+"\n"
     +"isIE7="+isIE7+"\n"
     +"isFF="+isFF+"\n"
     +"isOp="+isOP+"\n"
     +"isSf="+isSF+"\n"
     +"isCh="+isCH+"\n");
    </script>
      

  6.   


    function GetBrowser(){
    var Sys = {};
    var ua = navigator.userAgent.toLowerCase();
    var s;
    (s = ua.match(/msie ([\d.]+)/)) ? Sys.ie = s[1] :
    (s = ua.match(/firefox\/([\d.]+)/)) ? Sys.firefox = s[1] :
    (s = ua.match(/chrome\/([\d.]+)/)) ? Sys.chrome = s[1] :
    (s = ua.match(/opera.([\d.]+)/)) ? Sys.opera = s[1] :
    (s = ua.match(/version\/([\d.]+).*safari/)) ? Sys.safari = s[1] : 0;
    if (Sys.ie) return 'IE'+Sys.ie;
    else if (Sys.firefox) return 'FireFox';
    else if (Sys.chrome) return 'Chrome';
    else if (Sys.opera) return 'Opera';
    else if (Sys.safari) return 'Safari';
    else return 'Other';
    }PS，这段是抄别人的
      

  7.   

    路过顶....
    不过op和ff都可以伪装的....特别是op可以识别成任何浏览器....
      

  8.   

    function Nv(){ //浏览器版本
    var n=navigator.userAgent,v;
    if(n.indexOf("Chrome")>=0){
    v=1;
    }else if(n.indexOf("Firefox")>=0){
    v=2;
    }else{
    var r=/.+MSIE (\d+)\.0.+/;
    if(r.test(n)){
    v=n.replace(r,"$1");
    }else{
    v=0;
    }
    }
    return v;
    }
      

  9.   

    加载jquery.js   >.<