//All code copyright Adrian Furniss, 2005.
function e_link(user,site,text,clas){
	var clas = (!clas) ? 'nav' : clas;
	var url = (!user || !site) ? null : user + '@' + site;
	text = (!text) ? url : text;
	var HTMLstr = (url!=null) ? '<a class="' + clas + '" href=\"mailto:' + url + '\">' + text + '</a>' : '&nbsp;';
	document.write(HTMLstr);
}
/*
Sample Call
e_link('mrmann','ntlworld.com','Mister Mann')
*/