function doTrends(id,selected) {
	if (document.getElementById) {
	// sort out the right thing to display
		var nav_box = document.getElementById("link_box");
		var links = nav_box.getElementsByTagName("a");
		
		for ( var i = 0; i < links.length; i++ ) {
			// hide all
			document.getElementById('trends_' + i).style.display = 'none';
		}

		// show one with ID
		document.getElementById('trends_' + id).style.display = 'block';
		// get all links inside the right column

		// set all the links classes to nothing

		for(var i=0; i<links.length; i++)

		links[i].className = "";
		// set selected link as selected
		selected.className = "on";
		} else
		alert('Please update your browser');

}