function addLoadEvent(func) {
var oldonload = window.onload;
if (typeof window.onload != 'function') {
 window.onload = func;
 } else {
 window.onload = function() {
 oldonload();
func();
 }
 }
} 

function changeMail() {
if (!document.getElementsByTagName) return false;
 var span = document.getElementsByTagName("span");
 for (var i=0; i < span.length; i++) {
if (span[i].className.match('email')) {
 var innerspan = span[i].getElementsByTagName("span")[0].firstChild.nodeValue;
 span[i].innerHTML = "<a href='mailto:"+innerspan+"@outofgrey.com'>"+innerspan+"@outofgrey.com"
 }
 }
} 

addLoadEvent(changeMail);