function popupimg(file,w,h)
        {

      {
        x = screen.availWidth/2-w/2;
        y = screen.availHeight/2-h/2;
        var popupWindow = window.open(file,'','width='+w+',height='+h+',left='+x+',top='+y+',screenX='+x+',screenY='+y);
      }
}