//emailHyperlink('seth', 'savvynet', 'com.au', 'myclass');

function emailHyperlink(username, hostname, suffix, emailclass) {

	if (username == '' || hostname == '' || suffix == '') {
		var linktext = ""; 
	}
	else {		
		var linktext = username + "@" + hostname + "." + suffix;	
	}
	document.write("<a href=" + "mail" + "to:" + username + "@" + hostname + "." + suffix +" class='" + emailclass + "'><b>" + linktext + "</b></a>")
}