var Tabs = {
	Select: function(btn) {
		btn.className = "";
		
		var selIndex = 0;
		var i = 0;
		
		/* find tab button */
		var node = btn.parentNode.firstChild;
		while (node) {
			if (node.nodeType == 1) {
				if (btn == node) {
					selIndex = i;
					node.className = "active";
				} else {
					node.className = "";
				}
				i++;
			}
			node = node.nextSibling;
		}
		
		i = 0;
		
		/* find tab page */
		var node = btn.parentNode.nextSibling;
		while (node) {
			if (node.nodeType == 1) {
				if (i == selIndex) {
					node.className = "active";
				} else {
					node.className = "";
				}
				i++;
			}
			node = node.nextSibling;
		}
	}
};