function OpenWindow(Url, Height, Width) {
  if (Height == undefined)
    Height = 670;
    
  if (Width == undefined)
    Width = 600;
        
  var Window = window.open(Url, '', 'scrollbars=yes,menubar=yes' + 
                                    ',height=' + Height + 
                                    ',width=' + Width + 
                                    ',resizable=yes,toolbar=yes,location=no,status=no');  
  return false;
}