< html  xmlns ="http://www.w3.org/1999/xhtml"   >
     < SCRIPT  LANGUAGE ="JavaScript" >
function IsIE()
{
if (window.navigator.userAgent.indexOf("MSIE")>=1)
//如果浏览器为IE
{
alert("IE浏览器");
}
else //如果浏览器为Firefox
{
if (window.navigator.userAgent.indexOf("Firefox")>=1)
{
alert("Fixfox浏览器");
}
}
}
</ script >
< head  runat ="server" >
     < title > 判断浏览器类型 </ title >


</ head >
< body  onload ="IsIE();" >
     < form  id ="form1"  runat ="server" >
     < div >
    
     </ div >
     </ form >
</ body >
</ html >