<script language="JavaScript">
		    function doClick(index, numTabs, id) {
		        document.all("tab" + id, index).className = "tab";
		        for (var i= 1 ; i < numTabs; i++) {
		            document.all("tab" + id, (index + i) % numTabs).className = "backtab";
		        }
		        document.all("code" + id, index).style.display = "";
		        for (var j= 1 ; j < numTabs; j++) {
		          document.all("code" + id, (index + j) % numTabs).style.display = "none";
		        }
		    }
</script>