function popupwindow(url,x1,y1) 
{
      var s_width =0; 
	var s_height =0;
	var w_width = 0;
	var w_height = 0;
	var x=Math.round(x1);
	var y=Math.round(y1);
	var aspect_ratio=y/x; 
	var new_url='';
	var left=0;
	var top=0;
	s_width=screen.width; 
	s_height=screen.height;
	if (y > s_height) { 
 		s_height=s_height-240;
		s_width=Math.round(s_height/aspect_ratio);
      } else if (x > s_width){
		s_width = s_width -240;
		s_height=Math.round(s_width*aspect_ratio);
	} else {
		s_width = x-80;
		s_height = y-80;
	}
	
	w_width=s_width;
	w_height=s_height+200;
	s_width=s_width - 80;
	s_height=s_height - 80;
	left=Math.round((screen.width - w_width)/2);
	top=Math.round((screen.height - w_height)/2);
	//alert("x="+s_width+" y=" +s_height);
	var parameters="width="+w_width+",height="+w_height+",resizable=no,fullscreen=no,menubar=no,toolbar=no,location=no,scrollbars=no,status=no,top="+top+",left="+left;
	//alert(parameters);
	new_url=url+"&width="+s_width+"&height="+s_height;
	//alert(new_url);
	var newwindow=window.open(new_url, "", parameters);

}



function popupclose() {
window.close();


}