var fenster= "";

function openPopup(url,gross){

//wenn das fenster offen ist erst schließen
	if(fenster){
		fenster.close();
	}
// parameter fuer das popup 
	if(gross==1){
		para = "toolbar=no,title=Arzprofil,location=no,directories=no,menubar=no,scrollbars=yes,resizable=no,copyhistory=yes,width=662,height=420";
	}
	 else{
		 if(gross==2){
			para = "toolbar=no,title=Linksammlung,location=no,directories=no,menubar=no,scrollbars=yes,resizable=no,copyhistory=yes,width=600,height=360";
		 }
		  else{
			   if(gross==3){
				  para = "toolbar=no,title=Bilder,location=no,directories=no,menubar=no,scrollbars=yes,resizable=no,copyhistory=yes,width=450,height=320";
			   }
			    else{
					 if(gross==4){
						para = "toolbar=no,title=Plan,location=no,directories=no,menubar=no,scrollbars=yes,resizable=no,copyhistory=yes,width=650,height=320";
					 }
					 else{
						 if(gross==5){
							para = "toolbar=no,title=Impressum,location=no,directories=no,menubar=no,scrollbars=yes,resizable=no,copyhistory=yes,width=800,height=500";
						 }
			        }
			    }
		   }
	 }

// popup oeffnen
	fenster = window.open(url,"popup",para);
	fenster.focus;
}