function checkBrowser() {

	var appname = navigator.appName;
	var useragent = navigator.userAgent;
	var browser = "";
	var version = "";
	var checkpassed = false;
	alert(useragent);
	if (useragent.indexOf("Opera")!=-1) {
  		browser="Opera";
	} else if (useragent.indexOf("MSIE")!=-1) {
  		browser="Microsoft";
  	} else if (useragent.indexOf("Netscape")!=-1) {
  		browser="Netscape";
 	}
 
 
 }