function $(id){	
	return document.getElementById(id)
}


function iniMenu(tabObj,selNum){
	
	var collection = $(tabObj).getElementsByTagName("LI");
	var selObj = collection[selNum];
	selObj.className = 'active';
	$(tabObj+"_Content"+selNum).style.display = "block";

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

		collection[i].num= i;

		collection[i].onmousedown = function(){
			if(this != selObj){
				selObj.className = 'normal';
				this.className = 'active';
				$( tabObj+"_Content" + this.num).style.display="block";
				$( tabObj+"_Content" + selObj.num).style.display="none";
				selObj = this;
			}	
		}
	}

}