IE浏览器的判断

function compatibleIE8(){
var browser = navigator.appName;
var b_version = navigator.appVersion;
if(browser == "Microsoft Internet Explorer"){
var version = b_version.split(";")[1].replace(/[ ]/g,"");
if(version == "MSIE8.0"){
　　.........
}
}
}

2.

1. function isIE() { //ie?
2. if (!!window.ActiveXObject || "ActiveXObject" in window)
3. return true;
4. else
5. return false;
6. }