// JavaScript Document

var selected_id = null;
var dom = document.getElementById;

function swapIt(id, newclass) {
	if (dom) {
		if(selected_id != id) {
			document.getElementById(id).className = newclass;
		}
	}
}

function down (id,oldclass,newclass){
	if (dom) {
		if(selected_id != null) {
			document.getElementById(selected_id).className = oldclass;
		}
		document.getElementById(id).className = newclass;
		selected_id = id;
	}
}