Problem with Widgets error “HELP”

I have problem with my blog widgets…in top of the page appear this

OBJECT : 8306 –> o + ‘ li’).length ? maxheight – jQuery(‘#’ + o + ‘placemat’).height() : maxheight; jQuery(‘#’ + o).height(height); }); } function maxHeight(elm) { htmlheight = document.body.parentNode.clientHeight; bodyheight = document.body.clientHeight; var height = htmlheight > bodyheight ? htmlheight : bodyheight; jQuery(elm).height(height); } function getViewportDims() { var x,y; if (self.innerHeight) { // all except Explorer x = self.innerWidth; y = self.innerHeight; } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode x = document.docum ….

I cheack on source page on my browser…i think google ads insert this

function popControl(elm) {
var x = ( document.body.clientWidth – controldims[elm][‘width’])
<!— START <div style=”text-align: center;”><div style=”position:relative; top:0; margin-right:auto;margin-left:auto; z-index:99999″>
<script type=”text/javascript”><!–
google_ad_client = “pub-0621293941103089”;
google_ad_width = 468;
google_ad_height = 60;
google_ad_format = “468x60_as”;
google_ad_type = “text”;
google_ad_channel = “”;
google_ui_features = “rc:0”;
//–>
</script>
<script type=”text/javascript”
src=”http://pagead2.googlesyndication.com/pagead/show_ads.js”&gt;
</script>
</div></div> OBJECT : 8470 –>/2;

How this happen!!! Please HELP??? whats wrong with my blog!!!