function openSubWin( url, documentName )
{
	var UA  = navigator.userAgent.toUpperCase( ) ;
	var MAC = ( UA.indexOf("MAC") != -1 ) ? true : false ;

	var window_width  = ( MAC ) ? 615 : 615 ;
	var window_height = ( MAC ) ? 440 : 450 ;

	var startWinX = 0;
	var startWinY = 0;

winOption = "directories=no,status=no,scrollbars=no,toolbar=no,location=no,menubar=no,resizable=no,width=" + window_width + ",height=" + window_height + ",left=" + startWinX + ",top=" + startWinY ;

	window.open( url, documentName, winOption ) ;

}