function lihover(node){
	this.node = node;
	this.node.onmouseover = this.hover;
	this.node.onmouseout = this.out;
}
	lihover.prototype.hover = function(){
		if(this.className.indexOf('active') == -1){
			this.className += " over";
		}
	}
	
	lihover.prototype.out = function(){
		if(this.className.indexOf('active') == -1){
			this.className=this.className.replace(/\s?over/g, "");
		}
	}