function ImageWin(img){
  pic1= new Image();
  pic1.src=(img);
  Format(img);
}
function Format(img){
  if((pic1.width!=0)&&(pic1.height!=0)){
    ViewFoto(img);
  }
  else{
    task="Format('"+img+"')";
    interval=setTimeout(task,20);
  }
}
function ViewFoto(img){
  across=pic1.width+20;
  up=pic1.height+20;
  string="width="+across+",height="+up+",resizable=1,status=1";
  window=window.open(img,"",string);
}