if (!do_rbx_ctrk) {
	var do_rbx_ctrk = function (aElem, iTrkId, cTrkPrefix) {
		var imgElem = document.getElementById(iTrkId);
		if (!imgElem) {
			return true;
		}

		if (!aElem.rbxCPrefixed) {
			aElem.rbxCPrefixed = true;
			var destUri = encodeURIComponent(aElem.href);
			var newUri = cTrkPrefix + destUri;
			aElem.href = newUri;
		}
		return true;
	}

	var do_rbx_itrk = function (parentId, iTrkId, iTrkUri) {
		if (!document.images) {
			return false;
		}

		var imgId = iTrkId;
		var imgElem = document.getElementById(imgId);

		if (!imgElem) {

			var parentElem = document.getElementById(parentId);
			if (!parentElem) {
				return false;
			}

			var imgElem = document.createElement('img');
			if (!imgElem) {
				return false;
			}

			imgElem.id = imgId;
			imgElem.src = iTrkUri;
			imgElem.alt = '';
			imgElem.width = '1';
			imgElem.height = '1';

			parentElem.appendChild(imgElem);
		}
		return true;
	}
}