js區(qū)分ie6,，7，8,，9
<script type="text/javascript"> 
if(navigator.appName == 
"Microsoft Internet Explorer" && navigator.appVersion 
.split(";")[1].replace(/[ ]/g,"")=="MSIE6.0") 
{ 
alert("IE 6.0"); 
} 
else
 if(navigator.appName == "Microsoft Internet Explorer" && 
navigator.appVersion .split(";")[1].replace(/[ ]/g,"")=="MSIE7.0") 
{ 
alert("IE 7.0"); 
} 
else
 if(navigator.appName == "Microsoft Internet Explorer" && 
navigator.appVersion .split(";")[1].replace(/[ ]/g,"")=="MSIE8.0") 
{ 
alert("IE 8.0"); 
} 
else
 if(navigator.appName == "Microsoft Internet Explorer" && 
navigator.appVersion .split(";")[1].replace(/[ ]/g,"")=="MSIE9.0") 
{ 
alert("IE 9.0"); 
} 
</script>
css區(qū)分ie6,，7，8,，9

.ie6_7_8{
    color:blue; /*所有瀏覽器*/
    color:red\9; /*IE8以及以下版本瀏覽器*/
    *color:green; /*IE7及其以下版本瀏覽器*/
    _color:purple; /*IE6瀏覽器*/
}