function show(obj)
{
  Download(obj);
  var pic = window.document.main_pic;
  pic.src = obj.src;
  pic.width = obj.width;
  pic.height = obj.height;
  setImageSize(pic);
}
function Download(img) {
 if (img.complete) { return true; }
 else setTimeout("Download()", 1000);
}
function setImageSize(pic)
{
  var w = 150;
  var h = 90;
  if(pic.width >w){
    var per = ((pic.width-w)/pic.width)*100;
    var per2= (per/100)*pic.height;
    pic.width = w;
    pic.height = pic.height -per2;
  }
  if(pic.height >h){
    var per = ((pic.height-h)/pic.height)*100;
    var per2= (per/100)*pic.width;
    pic.height = h;
    pic.width = pic.width -per2;
  }
}