Try the following:
1)Add an id to the table like,
<table id="mytable"
2)put the below code inside head tag of your page:
<script type="text/javascript" >
window.onload = function(){
var table = document.getElementById("mytable");
var rows = table.getElementsByTagName("tr");
for(i=0;i<rows.length;i++)
{
rows[i].childNodes[
yourCellIndex].onclick = function(){event.cancelBubble = true;}
}
}
</script>
yourCellIndex = zero based index for the cell you want to disable onclick, for the second cell in a row it will be 1.
Hope this helps.
cheers!!