Obtain GCLID in two GCLID Fields of different forms

I have two forms and in each one I have a hidden input with the same id but different name, where the adwords gclid is captured by a script, my question because when the user sends the info from the 2 form I do not capture the gclid ?.

<script type="text/javascript">
function setCookie(name, value, days){
var date = new Date();
date.setTime(date.getTime() + (days*24*60*60*1000)); 
var expires = "; expires=" + date.toGMTString();
document.cookie = name + "=" + value + expires;
}
function getParam(p){
var match = RegExp('[?&]' + p + '=([^&]*)').exec(window.location.search);
return match && decodeURIComponent(match[1].replace(/\+/g, ' '));
}
var gclid = getParam('gclid');
if(gclid){
var gclsrc = getParam('gclsrc');
if(!gclsrc || gclsrc.indexOf('aw') !== -1){
    setCookie('gclid', gclid, 90);
}
}
</script>
<script> 
function readCookie(name) { 
  var n = name + "="; 
  var cookie = document.cookie.split(';'); 
  for(var i=0;i < cookie.length;i++) {      
  var c = cookie[i];      
  while (c.charAt(0)==' '){c = c.substring(1,c.length);}      
  if (c.indexOf(n) == 0){return c.substring(n.length,c.length);} 
  } 
  return null; 
  } 

  window.onload = function() {      
  document.getElementById('gclid_field').value = 
  readCookie('gclid'); 
  } 
  </script>