function bookmark_page(b_title, b_url){ 
	var gecko = 'Press Control-D to bookmark this page.';
	var safari = 'Press Apple-D to bookmark this page.';
	var opera = 'Please click on the "Bookmarks" menu item and select "Add page here..."';
	
	if(window.external) {
		external.AddFavorite(b_url, b_title);
	}
	else{
		var b = navigator.userAgent;
	
		if((b.indexOf("Netscape") != -1) || ((b.indexOf("Mozilla") != -1) && (b.indexOf("Gecko") != -1))) {
			alert(gecko);
		}
		else if(b.indexOf("Safari") != -1) {
			alert(safari);
		}
		else if(b.indexOf("Opera") != -1) {
			alert(opera);
		}
	}
}