Track AdSense Clicks in Google CSE?

[oddcomments]

I'm trying to track only the queries that result in AdSense clicks, but not in all queries. The PHP to MySQL part is easy and I've figured out how to use JavaScript to identify the AdSense ads and triger a function on onClick. I'm stuck at the part with how to call the PHP page with that function.

Anyone have any ideas? Here's what I have so far:

PHP Code:

<script type="text/javascript">
<!--
// THIS CODE MUST BE **AFTER** THE GOOGLE CSE CODE

function adSenseClick() {
    // WHAT GOES IN HERE?
    // It needs to send: "/AdSenseTracker.php?Query=blue%20widgets&Destination=http://widgets.com/blue.html"
}

function load1 () {
    var AdSense = window.frames["googleSearchFrame"].document.getElementById('pa1');
    if (AdSense)
        AdSense.onclick = adSenseClick;
}

function load2 () {
    var AdSense = window.frames["googleSearchFrame"].document.getElementById('pa2');
    if (AdSense)
        AdSense.onclick = adSenseClick;
}

function load3 () {
    var AdSense = window.frames["googleSearchFrame"].document.getElementById('pa3');
    if (AdSense)
        AdSense.onclick = adSenseClick;
}

function load4 () {
    var AdSense = window.frames["googleSearchFrame"].document.getElementById('pa4');
    if (AdSense)
        AdSense.onclick = adSenseClick;
}

function load5 () {
    var AdSense = window.frames["googleSearchFrame"].document.getElementById('pa5');
    if (AdSense)
        AdSense.onclick = adSenseClick;
}

function load6 () {
    var AdSense = window.frames["googleSearchFrame"].document.getElementById('pa6');
    if (AdSense)
        AdSense.onclick = adSenseClick;
}


function doload () {
    if (document.getElementsByTagName &&
            document.getElementsByTagName ('body')) {
        load1 ();
        load2 ();
        load3 ();
        load4 ();
        load5 ();
        load6 ();
    }
}

window.onload = doload;

//-->
</script> 


[oddcomments]

I found the solution:

PHP Code:

function adSenseClick() {
     (new Image()).src = '/AdSenseTracker.php?Q=bwidgets&D=http://widgets.com/';
} 


...which is the call I started with. The real problem is this:

HERE'S THE REAL PROBLEM...
Google's iframe sets the anchors to "target=_top". I changed the anchor targets in my test Google iframe to "_blank" vs. "_top" and it works great. It definitely seems that the problem lies with the JavaScript not executing before the visitor leaves the page.

Anyone know how to override the anchor target in a frame you have no control over?
.