function popup(relPage, breite, hoehe) {
   var w=window.open(relPage, "_blank", "left=20,top=20,resizable=yes");
//	w.innerWidth=breite;
//	w.innerHeight=hoehe;
	w.resizeTo(breite, hoehe);
	w.focus();
}

function timeDifference(earlierdate, laterdate) {
    var difference = laterdate.getTime()- earlierdate.getTime() ;

    var daysDifference = Math.floor(difference/1000/60/60/24);
    difference -= daysDifference*1000*60*60*24;
    var hoursDifference = Math.floor(difference/1000/60/60);
    difference -= hoursDifference*1000*60*60;
    var minutesDifference = Math.floor(difference/1000/60);
    difference -= minutesDifference*1000*60;
    var secondsDifference = Math.floor(difference/1000);


    if (daysDifference == 0 && hoursDifference > 0 && minutesDifference > 0)
    {
        document.HochzeitForm.anz.value = daysDifference;
    }
    else if(daysDifference < 0){
        document.HochzeitForm.anz.value = daysDifference;
    }
    else{
        document.HochzeitForm.anz.value = daysDifference;
    }
}