Parse and Extract several Studio Session Storage values and use them for an iframe/pixel URL

studio.parse.iframe.js

//Parse and Extract values from text like "key=HELLO&value=WORLD&test=OK"
function getUriParameter(UriString, targetKey) {
    var sPageURL = UriString;
    var sURLVariables = sPageURL.split('&');
    for (var i = 0; i < sURLVariables.length; i++)
    {
        var sParameterName = sURLVariables[i].split('=');
        if (sParameterName[0] == targetKey)
        {
            return sParameterName[1];
        }
    }
}

//Create and attach an iFrame tag to the body
function addIframe(src) {
    var s = document.createElement( 'iframe' );
    s.setAttribute( 'src', src );
    s.style.width=1;
    s.style.height=1;
    document.body.appendChild(s);
}

//grab studio LEAD_ID from JSON encoded session storage variable
var lead_id = JSON.parse(window.sessionStorage.getItem('crm.session_completed_fields'))['lead_id']
//grab the C1 URI value (it's passed in via the URL and stored in session storage)
var c1 = getUriParameter(window.sessionStorage.getItem('crm.session_params'), "c1")
//create the iframe src/link using the variables above
var iframeSrc = 'https://c.verifyconv.com/pixel?cid=25857&refid=' + lead_id + '&clickid=' + c1;

//create the iframe (using the link/src we just created)
addIframe(iframeSrc);