// override css to avoid bugs of brawser
function writeCSS( path ) {
	// to avoid CSS bug of Netscape 
	if( getBrowserName() == "Netscape" ) {
		var html='<link href="' + path + 'common_css/screen_netscape.css" rel="stylesheet" type="text/css" media="all" />';
		document.write( html );
	}
}