function popup_open(url,size_x,size_y)
{ 
    document.getElementById("popup_frame").src=url;
    document.getElementById("popup_frame").width=size_x;
    document.getElementById("popup_frame").height=size_y;
    document.getElementById("bg_trans").style.display='block';
}
function popup_close()
{ 
    document.getElementById("popup_frame").src="";
    document.getElementById("bg_trans").style.display='none';
}
function calcHeight()
{
  //find the height of the internal page
  var popup_frame=
    document.getElementById('popup_frame').contentWindow.
      document.body.scrollHeight;

  //change the height of the iframe
  document.getElementById('popup_frame').height=
      popup_frame;
}		
function refresh(){
	var currentURL = parent.window.location;
	//alert ( currentURL.href );     // Displays 'http://www.example.com:80/example.cgi?x=3&y=4#results
	parent.location.href=currentURL.href;
}