var strAttr = document.getElementById('email').getAttribute('id');
var strName = document.getElementById('email').innerHTML;
//var strDomain = "@regtheveg.co.uk";
var strDomain = "@yahoo.co.uk";

document.write('<a href="mailto:' + strName + strDomain + '" title="email ' + strName + strDomain + '"> ' + strName + strDomain + '</a>');