window.onload = function () {
	if (document.getElementById('worldMap') != null) {
		var li = document.getElementById('worldMap').getElementsByTagName('li');
		for(var i = 0; i < li.length; i++) {
			li[i].onmouseover = function () {
				this.className = 'on';
			}
			li[i].onmouseout = function () {
				this.className = 'off';
			}
		}
	}
}