if (navigator.appVersion.indexOf("2.") != -1){	check = false;	}if ((navigator.appVersion.indexOf("3.") != -1) && (navigator.appName.indexOf("Explorer") != -1)){	check = false;	}else {	check = true;	}image1= new Image();image1.src = "images/enter.gif";image1on = new Image();image1on.src = "images/enter-over.gif";function imageon(name)   {        document[name].src = eval(name + "on.src");}function imageoff(name)  {        document[name].src = eval(name + ".src");}function on(name)  {        if (check == true){	imageon(name);	}}function off(name)  {        if (check == true){	imageoff(name);	}}