function scrollDoor() {
}
scrollDoor.prototype = {
	sd: function(menus, divs, openClass, closeClass) {
		var _this = this;
		if (menus.length != divs.length) {
			alert("菜单层数量和内容层数量不一样!");
			return false;
		}
		for (var i = 0; i < menus.length; i++) {
			_this.$(menus[i]).value = i;
			_this.$(menus[i]).onmouseover = function() {

				for (var j = 0; j < menus.length; j++) {
					_this.$(menus[j]).className = closeClass;
					_this.$(divs[j]).style.display = "none";
				}
				_this.$(menus[this.value]).className = openClass;
				_this.$(divs[this.value]).style.display = "block";
			}
		}
	},
	$: function(oid) {
		if (typeof (oid) == "string")
			return document.getElementById(oid);
		return oid;
	}
}