Instructions for adding Google AdWords GCLID tracking for the Conversion Upload tool

Form.html

/* 2. Modify your site’s prospect lead information submission page — usually, a lead submission form — to read the 
   *    GCLID from the cookie and pass it along to your lead management system, along with the lead’s contact information.
   *    You can retrieve the GCLID value via your choice of client- or server-side languages. Once retrieved, it’s a good 
   *    idea to pass the GCLID through your lead submission form as a hidden field element.
   *    Here’s an example form with a hidden field for collecting the GCLID. You should insert the highlighted <input> 
   */    tag in between your <form> tags.:

   <form action="" name="myForm"> 		
         Name: <input type="text" name="name"> 		
         <input type="hidden" id="gclid" name="gclid" value=""> 	 	
         <input type="submit" value="Submit Form" name="btnSubmit"> 	
   </form>

Read Cookie.html

 /* 3. Here’s example JavaScript code you can use to retrieve the GCLID value from the cookie and update the value of the 
    *    hidden form element. It’s important that you insert this code after the GCLID collection code in the 
    */    previous step and before the closing </body> tag.
     
<script> 
    function readCookie(c_name) {
        var c_value = document.cookie;
        var c_start = c_value.indexOf(" " + c_name + "=");
        if (c_start == -1) {
            c_start = c_value.indexOf(c_name + "=");
        }
        if (c_start == -1) {
            c_value = null;
        } else {
            c_start = c_value.indexOf("=", c_start) + 1;
            var c_end = c_value.indexOf(";", c_start);
            if (c_end == -1) {
                c_end = c_value.length;
            }
            c_value = unescape(c_value.substring(c_start, c_end));
        }
        return c_value;
    }

    window.onload = function () {

        document.getElementById('gclid').value = readCookie('gclid');
    }
</script>

Set Cookie.html

   /* 1. Update the code on each of your web pages to capture and store the GCLID in a cookie.
    *    Here's sample JavaScript code you can use on each web page to store the GCLID in a cookie named "gclid.”
    *    It’s a good idea to insert this code at the bottom of every web page, immediately before the closing </body> 
    *    tag. This way, you don’t have to add it every time you create new ads with new landing pages, or worry about 
    */    losing GCLIDs if you change landing pages for existing ads.

<script type="text/javascript">
    function setCookie(a, d, b) {
        var c = new Date;
        c.setTime(c.getTime() + 864E5 * b);
        b = "; expires=" + c.toGMTString();
        document.cookie = a + "=" + d + b
    }

    function getParam(a) {
        return (a = RegExp("[?&]" + a + "=([^&]*)").exec(window.location.search)) && decodeURIComponent(a[1].replace(/\+/g, " "))
    }
    var gclid = getParam("gclid");
    if (gclid) {
        var gclsrc = getParam("gclsrc");
        (!gclsrc || -1 !== gclsrc.indexOf("aw")) && setCookie("gclid", gclid, 90)
    };
</script>