var suf1 = "co.";
var suf2 = "uk";
var dmn = "clickschool"; 

function pnteml(emlname,caption) {
  if (caption==undefined) {
   caption = emlname; 
  }
  mailstring= "<a href='javascript:emlaunch(\"" + emlname + "\");' title='Contact Address'>"+ caption +"</a>";
  document.write(mailstring);
}

function emlaunch(emlname) {
  var thsads = "ma" + "i" + "lto:" + emlname + "@" + dmn + "." + suf1 + suf2;
  document.location=thsads;
}