Determine browser type

function myBrowser(){
	 var userAgent = navigator.userAgent;
	 var isOpera = userAgent.indexOf("Opera") > -1;
	 if (isOpera) {
		 return "Opera"
	 }; //is Opera browser
	 if (userAgent.indexOf("Firefox") > -1) {
		 return "FF";
	 } // is Firefox browser
	 if (userAgent.indexOf("Chrome") > -1){
		 return "Chrome";
	 }
	 if (userAgent.indexOf("Safari") > -1) {
		 return "Safari";
	 } //is Safari browser
	 if (userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera) {    
		 return "IE";
	 }; //is IE browser
 };

 

 

Use directly

var browserType = myBrowser();

if("IE" == browserType){

alert("IE");

}