function addEvent(obj, evType, fn){ 
 if (obj.addEventListener){ 
   obj.addEventListener(evType, fn, false); 
   return true; 
 } else if (obj.attachEvent){ 
   var r = obj.attachEvent("on"+evType, fn); 
   return r; 
 } else { 
   return false; 
 } 
}

function go() {
var name = "contact";
var domain = "studioschmidt.de";
var dort = document.getElementById('m');
dort.innerHTML = '<a href=\"mailto:' + name + '@' + domain + '">' + name + '@' + domain + '</a>';
}

addEvent(window, 'load',  go);