function pop(url, width, height, scrollbars, resizable, left, top)
{
// set up defaults
if (width == null) width = 627;
if (height == null) height = 600;
if (scrollbars == null) scrollbars = "auto";
if (resizable == null) resizable = "yes";
if (left == null) left = 0;
if (top == null) top = 0;

popup=window.open(url,"","width="+width+",height="+height+",scrollbars="+scrollbars+", left="+left+", top="+top+", resizable="+resizable+"");
}