function ShowPage(htmlurl,Subwin,ww,hh)
{
 if (!hh) { hh=screen.height/5*3;}
 if (!ww) { ww=620;} 

 if (!Subwin)  { Subwin  ="_blank";}

var win_cfg = "status=0,directories=0,menubar=0,location=no,scrollbars=yes,resizable=yes,toolbar=0,align=center,valign=center,top=30,left=30,width=" + ww + ",height=" + hh;
var newwin=window.open(htmlurl,Subwin,win_cfg);
mywin=newwin;
return false;
}