function add_bookmark(url, title) {
	var ua = navigator.userAgent.toLowerCase();
	var isKonq = (ua.indexOf('konqueror') != -1);
	var isSafari = (ua.indexOf('webkit') != -1);
	var isMac = (ua.indexOf('mac') != -1);
	var buttonStr = isMac ? 'Command/Cmd' : 'CTRL';
	if (window.external && (! document.createTextNode || (typeof(window.external.AddFavorite) == 'unknown'))) {
		window.external.AddFavorite(url, title); // IE/Win
		}
	else if (isKonq) {
		alert('You need to press CTRL + B to bookmark our site.');
		}
	else if (window.opera) {
		void(0); // do nothing here (Opera 7+)
		}
	else if (window.home || isSafari) { // Firefox, Netscape, Safari, iCab
		alert('You need to press ' + buttonStr + ' + D to bookmark our site.');
		}
	else if (! window.print || isMac) { // IE5/Mac and Safari 1.0
		alert('You need to press Command/Cmd + D to bookmark our site.');    
		}
	else {
		alert('In order to bookmark this site you need to do so manually through your browser.');
		}
	}