/**
 * URL link updater for cross-site UTM code transposing
 * 
 * Update the validURLPattern variable regular expression to match your desired pattern
 * that indicates link HREF values that go to the second-site.
 */
try {
    // URL pattern regular expression, change this to match your call to action links
    var validURLPattern = new RegExp("my-conversion-point-domain\.com");
    // The search string
    var queryStr = document.location.search;
    
    // Only update if we have UTM parameters
    if(queryStr.match(/utm_campaign|utm_source|utm_medium/)){
        // Build object of UTM parameters
        var utm = {
            campaign: queryStr.match(/utm_campaign/) ? queryStr.match(/utm_campaign\=([^&]*)/)[1] : "",
            source: queryStr.match(/utm_source/) ? queryStr.match(/utm_source\=([^&]*)/)[1] : "",
            medium: queryStr.match(/utm_medium/) ? queryStr.match(/utm_medium\=([^&]*)/)[1] : ""
        };
        
        // Loop through all A tags and update
        $('a').each(function(){
            // Only update if HREF refers to dtelepathy.com
            if(this.href.match(validURLPattern)){
                // Determine starting separator
                var sep = this.href.indexOf("?") == -1 ? "?" : "&";
                
                // Loop through UTM parameters to update
                for(var k in utm){
                    // Check if URL already contains this UTM parameter
                    if(this.href.indexOf("utm_" + k) != -1){
                        var regexp = new RegExp("utm_" + k + "=([^&]*)");
                        this.href = this.href.replace(regexp, "utm_" + k + "=" + utm[k]);
                    }
                    // Append if not
                    else {
                        this.href += sep + "utm_" + k + "=" + utm[k];
                        // Change separator now since we're appending to a now existing query string
                        sep = "&";
                    }
                }
            }
        });
    }
} catch(e) {}

This script was written to allow transposing of utm_campaign, utm_source and utm_medium query parameters from the URL of a landing page link to all of the links on that page that re-directed to the primary domain where users would actually convert. This is highly useful when sending out email campaigns that link people to a landing page on a hosted service such as Unbounce and your conversion points exist on a different top-level domain as it will allow you to see the campaign, medium and source values on the top-level domain Google Analytics conversion reports, even though the visitor initially landed on a different top-level domain.

Cross-domain Google Analytics Campaign Transposing

google

JavaScript