function create_window(image, width, height) 
{
	width = width + 40;
	height = height;

	var window_spec = "location=no, scrollbars=no, menubars=no, toolbars=no, resizable=yes, left=0, top=0, width=0 , height=0";
	var url = "image_window.php?image=" + image;
	pop_up_window = window.open(url, 'pop_up_window', window_spec); 
	pop_up_window.resizeTo(width,height);
	pop_up_window.focus();

}