js判断浏览器版本

 

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;
             }
 }
 ////IE////
 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);