var newwin;

function screenswitch() {   
if (screen.width > 800) {
	 winurl = ("gross/worpswederferienhaus.html");
    } else {
            winurl = ("klein/worpswederferienhauskl.html");
     
 }

    newwin = parent.location=(winurl);
    if(javascript_version > 1.0) {
        setTimeout('newwin.focus();',250);
    }
}