function getImage(img){
  image1= new Image();
  image1.src=(img);
  sizeWindow(img);
}
function sizeWindow(img){
  if((image1.width!=0)&&(image1.height!=0)){
    showImage(img);
  }
  else{
    reTry="sizeWindow('"+img+"')";
    interval=setTimeout(reTry,20);
  }
}
function showImage(img){
  sizeX=image1.width+20;
  sizeY=image1.height+20;
  var winl = (screen.width - sizeX) / 2;
  var wint = (screen.height - sizeY) / 2;
  dimension="width="+sizeX+",height="+sizeY+" ,top="+wint+" ,left="+winl+", titlebar =yes";
  finalizeImage=window.open(img, "",dimension);
}