<!--
function checkform(form)
	{
		for (var x=0 ; form.elements[x] ; x++)
			if (form.elements[x].value == "") 
		  	{		
		  		if(form.elements[x].id != "none")
				{
			    alert( "Je bent vergeten het '"+form.elements[x].id+"' veld in te vullen." );
			    form.elements[x].focus();
			    return false ;
				}
		  	}

	}		


function popupWindow(url) {
  window.open(url,'popupWindow','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width=100,height=100,screenX=150,screenY=150,top=150,left=150')
}


//-->