function OpenWin(adres,X,Y,XB,YB)
{
   XB2=0
   YB2=0
   if (XB > 0) { XB2=XB ; }
   if (YB > 0) { YB2=YB ; }
   
   X2=screen.availWidth-5-XB2
   Y2=screen.availHeight-30-YB2
   if (X > 0) { X2=X ; }
   if (X < 0) { X2=screen.availWidth+X-5-XB2 ; }
   if (Y > 0) { Y2=Y ; }
   if (Y < 0) { Y2=screen.availHeight+Y-30-YB2 ; }   

 if(false == my_window.closed) 
 {
    my_window.close ();
 }
page='window.open(adres,"CVD","' ;
   if (navigator.appName == 'Netscape') { page = page + ',ScreenX=' + XB2 + ',ScreenY=' + YB2 + ')' ; } 
   else { page = page + 'left=' + XB2 + ',top=' + YB2 ; } 
   page = page + ',height=' + Y2 + ',width=' + X2 + ',toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes")' ; 
   
 my_window = eval(page) ;
}

my_window = 0