function popup(mylink, windowname, left, top, width, height,scrollbars)
{
        if (! window.focus) return true;

        var href;

        if(typeof(mylink) == 'string')
        	href=mylink;
        else
       		href=mylink.href;

        var windowprops="location=no,scrollbars=" + scrollbars + 
		",menubars=no,toolbars=no,resizable=yes" +
        	",left=" + left + ",top=" + top + 
		",width=" + width + ",height=" + height;

        window.open(href, windowname, windowprops);

        return false;
}