DFP html5 clicktag file

clickTag.js

window.onload = function() {
    if (!!Enabler.isInitialized()) {
        enablerInitHandler();
    } else {
        Enabler.addEventListener(studio.events.StudioEvent.INIT, enablerInitHandler);
    }
}

function enablerInitHandler() {
    document.getElementById('canvas').addEventListener('click', clickThrough, false);
    document.getElementById('canvas').style.visibility = "visible";
    document.getElementById('canvas').style.cursor = "pointer";
}

function clickThrough() {
    window.open(window.clickTag);
    return false;
}