// pup up a window without buttons etc, with a given image size and URL
function popbox(linkje,x,y) { 
  window.open("showpic.php?pic="+linkje,"preview","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,copyhistory=0,WIDTH="+(x)+",HEIGHT="+(y)+"");
}