var nav = navigator.userAgent.toLowerCase();
	var is_ie = (navigator.appName.indexOf("Microsoft") != -1);
	var is_ie3 = ((is_ie) && (parseFloat(navigator.appVersion) < 4));
    	var is_ie4 = ((is_ie) && (parseFloat(navigator.appVersion)== 4) &&
					(nav.indexOf("msie 4")!=-1) );
	var is_ie5up  = (is_ie && !is_ie3 && !is_ie4);
	
	var is_nav = ((navigator.appName == "Netscape") && 
				  (navigator.userAgent.indexOf("Mozilla") != -1));
	var is_nav6up = ( (is_nav) && (parseFloat(navigator.appVersion) >= 5) );

	var minPlayer = 4