var popImg = null;

function openPopImg(picName, width, height)
 {
 closePopImg();
 myWidth = parseInt(width) + 20;
 myHeight = parseInt(height) + 25; 
 winfmt = "toolbar=no,scrollbars=no,resizable=yes,width=" + myWidth + ",height=" + myHeight;
 popImg = window.open( picName, "popImg", winfmt );
 }

function closePopImg()
 {
 if ( navigator.appName != "Microsoft Internet Explorer" || parseInt(navigator.appVersion) >=4 )
  { if( popImg != null ) { if( !popImg.closed ) { popImg.close(); } } }
 }