function showForm() {       
        document.getElementById("versenden").style.visibility="visible";
       }

function hideForm(){

        document.getElementById("versenden").style.visibility="hidden";
     }



function pop_window(quelle,fenstername,breite,hoehe) {

   popy=window.open(quelle,fenstername, "width="+breite+",height="+hoehe+",scrollbars");
   popy.focus();
}