function StartPageUeberblick(link, a_id) {
	// link, - the url to open
	// a_id - the id of the window to focus or to open as target via an anchor link
       var theURL = link;
       var left, top;
       top=(window.screen.availHeight/2)-340;
       left=(window.screen.availWidth/2)-410;
       var fenster;
       fenster = window.open(theURL,a_id,"width=800,height=600,top="+top+",left="+left+",location=no,menubar=no,resizable=yes,scrollbars=no,status=no,toolbar=no,titlebar=yes");       
       fenster.focus();
}

function StartPageHelp(link, a_id) {
       var theURL = link;
       var left, top;
       top=(window.screen.availHeight/2)-340;
       left=(window.screen.availWidth/2)-410;
       var fenster;
       fenster = window.open(theURL,a_id,"width=850,height=600,top="+top+",left="+left+",location=no,menubar=no,resizable=yes,scrollbars=yes,status=yes,toolbar=no,titlebar=yes");
       fenster.focus();
}

function StartPageDemo(link, a_id) {
       var theURL = link;
       var left, top;
       top=(window.screen.availHeight/2)-340;
       left=(window.screen.availWidth/2)-450;
       var fenster;
       fenster = window.open(theURL,a_id,"width=920,height=656,top="+top+",left="+left+",location=no,menubar=no,resizable=yes,scrollbars=yes,status=yes,toolbar=no,titlebar=yes");
       fenster.focus();
}