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);