if(navigator.appName.indexOf("Netscape") > -1 && navigator.appVersion.substr(0,1) <= "4")
parent.location.href="sperre.htm";

if(navigator.appVersion.indexOf("MSIE")>-1)
{
	//parent.location.href="sperre.htm";
	document.write('<link rel="Stylesheet" href="css/_ie.css" type="text/css" />');
}//else {
		// document.write('<link rel="Stylesheet" href="_stylesheet.css" type="text/css" />');
		//}