function show_img(img,width,height)
{
   var a
   var b
   var url
   vidWindowWidth=width;
   vidWindowHeight=height;
   a=(screen.height-vidWindowHeight)/5;
   b=(screen.width-vidWindowWidth)/2;
   features="top="+a+",left="+b+",width="+vidWindowWidth+",height="+vidWindowHeight+",toolbar=no,menubar=no,location=no,directories=no,scrollbars=no,resizable=no";
   url="../shared/show.php?img="+img;
   window.open(url,'',features,true);
   return false;
}

function resize() { 
  if (navigator.userAgent.indexOf("Mac")!=-1 || 
      navigator.userAgent.indexOf("Gecko")!=-1 ||   
      navigator.userAgent.indexOf("Netscape")!=-1) 
    var offset = 0; 
  else     var offset = 4; 
  window.moveTo(50, 50); 
  window.resizeTo(500, 550) 
} 

function maxwind() { 
  if (navigator.userAgent.indexOf("Mac")!=-1 || 
      navigator.userAgent.indexOf("Gecko")!=-1 ||   
      navigator.userAgent.indexOf("Netscape")!=-1) 
    var offset = 0; 
  else     var offset = 4; 
  window.moveTo(-offset, -offset); 
  window.resizeTo(screen.availWidth+(2*offset), screen.availHeight+(2*offset)) 
}