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<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;
}

var query = window.location.search.substr(1);
if (query.length > 0) {
	var params = query.split("&");
	for (var i=0; i<params.length; i++) {
		var pos = params[i].indexOf("=");
		var name = params[i].substring(0, pos);
		if (name == "gclid") {
			var value = params[i].substring(pos + 1);
			setCookie(name, value, 90);
		}
	}
}
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('AdWordsID ').value = readCookie('gclid');
}
-->
</script>