function revealCoupon(url) {
 var cpDataElm = document.getElementById('cpData');
 var temp = cpDataElm.innerHTML;
 var cpCodeLst = temp.split(',');
 var cpElm = document.getElementById('cp');
 var str = '';
 for (var i = 0; i < cpCodeLst.length; i++) {
  str += cpCodeLst[i] + "\n";
 }
 window.open(url);
 cpElm.innerHTML = str;
}