function Scherm(URL){
         window.open(URL, "nieuw", "width=800,height=500,status=yes,toolbar=no,scrollbars=yes");
         }
		 
function Help(URL){
         window.open(URL, "help", "top=50,left=150,width=250,height=400,status=no,toolbar=no,scrollbars=no");
         }

function infotheek(URL){
         window.open(URL, "info", "top=140,left=0,status=no,toolbar=no,scrollbars=yes");
         }