var IsIE = false;
var IsOpera = false;
/*Detect that browser open document*/
	if(window.navigator.appName == "Microsoft Internet Explorer")
		/*Browser is Internet Explorer*/
		IsIE = true;
		
	else 
	{
		/*Browser is Mozila, Opera, etc.*/		
		IsIE = false; 
		if(window.navigator.appName== "Opera"){
			/*Browser is Opera*/
			IsOpera = true; 
		}else {
			/*Browser is not Opera*/
			IsOpera = false;
		}
	}