After installing the "Campaign Tracker" application into your Salesforce org:

http://appexchange.salesforce.com/listingDetail?listingId=a0N30000009w2tgEAA

add the script code below to your web site.

The following code should be placed just above the </body> tag on all pages of your web site where you wish to track your visitors.

* Any page with a Salesforce web-to-lead form MUST have this code.
* This code should come AFTER any Google Analytics code (for simplicity, please make sure it is the last item before the </body> tag).
* Please be careful not to add line breaks when pasting the code, especially between any quotation marks, as this may cause an error.

Complete Documentation on the Campaign Tracker app:

http://www.cloudamp.com/docs/google-analytics-campaign-tracker.pdf



<script>
var _cloudAmp={};(function(){var a=document.getElementsByTagName("script");var d=a.length;_cloudAmp.validScripts=[];_cloudAmp.attachOnloadEvents=function(g){g.script.onreadystatechange=function(){if(g.script.readyState==="loaded"){g.loaded=true}};g.script.onload=function(){g.loaded=true}};for(var f=0;f<d;f+=1){if(a[f].src){var c={script:a[f],src:a[f].src,loaded:false};_cloudAmp.validScripts.push(c);_cloudAmp.attachOnloadEvents(c)}}var b=document.createElement("script");b.type="text/javascript";b.async=true;b.src="https://1d5ef9e9369608f625a8-878b10192d4a956595449977ade9187d.ssl.cf2.rackcdn.com/cloudamp_min.js";var e=document.getElementsByTagName("head");e[0].appendChild(b)})();
</script>