var showhide = {
	menu_id : 'sm-promociones',
	divs : function() {
		var lis = document.getElementById(this.menu_id).getElementsByTagName('li')
		var div_items = new Array()
		for( var h=0; h<lis.length; h++) {
			div_items[h] = (lis[h].getElementsByTagName('a')[0].hash).substr(1)
		}
		return div_items
	},
	hide_all : function() {
		for (var i=0; i<this.divs().length; i++) {
			document.getElementById(this.divs()[i]).style.display = 'none'
		}
	},
	show_layer : function(which_one) {
		this.hide_all()
		document.getElementById(which_one).style.display = 'block'
	},
	active_link : function(item) {
		for (var i=0; i<document.getElementById(this.menu_id).getElementsByTagName('li').length; i++) {
			document.getElementById(this.menu_id).getElementsByTagName('li')[i].className = '';
		}
		item.parentNode.className = 'active';
	},
	init : function() {
		for (var j=0; j<document.getElementById(this.menu_id).getElementsByTagName('li').length; j++) {
			document.getElementById(this.menu_id).getElementsByTagName('li')[j].getElementsByTagName('a')[0].onclick = function() {
				var target_div = this.hash.substr(this.hash.indexOf('#')+1)
				showhide.active_link(this);
				showhide.show_layer(target_div);
				return false;
			}
		}
		var start_at = 0;
		this.show_layer(this.divs()[start_at]);
		this.active_link(document.getElementById(this.menu_id).getElementsByTagName('li')[start_at].getElementsByTagName('a')[0]);
	}
}	
window.onload = function() {
	showhide.init();
}