function $(name)
{
	return document.getElementById(name);
}

var prevTabId = null;

function switchTab(current)
{
	if (prevTabId == current) return;
	
	if(prevTabId != null)
	{
		var prevTab = $("tab_" + prevTabId);
		var prevContent = $("content_" + prevTabId);
		
		prevTab.className = "";
		prevContent.style.display = "none";
	}
	
	var currentTab = $("tab_" + current);
	var currentContent = $("content_" + current);
	
	currentTab.className = "current";
	currentContent.style.display = "block";
	
	prevTabId = current;
}

// 说明：一个非常健全的 Javascript 链接(URL)解析类
// 整理：http://www.CodeBit.cn

/** 
* @projectDescription 	Poly9's polyvalent URLParser class
*
* @author	Denis Laprise - denis@poly9.com - http://poly9.com
* @version	0.1 
* @namespace	Poly9
*
* See the unit test file for more examples.
* URLParser is freely distributable under the terms of an MIT-style license.
*/

if (typeof Poly9 == 'undefined')
{
	var Poly9 = {};
}

/**
 * Creates an URLParser instance
 *
 * @classDescription	Creates an URLParser instance
 * @return {Object}	return an URLParser object
 * @param {String} url	The url to parse
 * @constructor
 * @exception {String}  Throws an exception if the specified url is invalid
 */
Poly9.URLParser = function(url) {

	this._fields = {
		'Username' : 4, 
		'Password' : 5, 
		'Port' : 7, 
		'Protocol' : 2, 
		'Host' : 6, 
		'Pathname' : 8, 
		'URL' : 0, 
		'Querystring' : 9, 
		'Fragment' : 10
	};

	this._values = {};
	this._regex = null;
	this.version = 0.1;
	this._regex = /^((\w+):\/\/)?((\w+):?(\w+)?@)?([^\/\?:]+):?(\d+)?(\/?[^\?#]+)?\??([^#]+)?#?(\w*)/;

	for(var f in this._fields)
	{
		this['get' + f] = this._makeGetter(f);
	}

	if (typeof url != 'undefined')
	{
		this._parse(url);
	}
}
 
/**
 * @method 
 * @param {String} url	The url to parse
 * @exception {String} 	Throws an exception if the specified url is invalid
 */
Poly9.URLParser.prototype.setURL = function(url) {
	this._parse(url);
}

Poly9.URLParser.prototype._initValues = function() {
	for(var f in this._fields)
	{
		this._values[f] = '';
	}
}

Poly9.URLParser.prototype._parse = function(url) {
	this._initValues();
	var r = this._regex.exec(url);
	if (!r) throw "DPURLParser::_parse -> Invalid URL";

	for(var f in this._fields) if (typeof r[this._fields[f]] != 'undefined')
	{
		this._values[f] = r[this._fields[f]];
	}
}

Poly9.URLParser.prototype._makeGetter = function(field) {
	return function() {
		return this._values[field];
	}
}

function scoller(ul, delay, speed, lh) {
	var slideBox = (typeof ul == 'string')?document.getElementById(ul):ul;
	var delay = delay||1000, speed=speed||20, lh = lh||20;
	var tid = null, pause = false;
	var start = function() {
		tid=setInterval(slide, speed);
	}
	var slide = function() {
		if (pause) return;
		slideBox.scrollTop += 2;
		if (slideBox.scrollTop % lh == 0) {
			clearInterval(tid);
			slideBox.appendChild(slideBox.getElementsByTagName('li')[0]);
			slideBox.scrollTop = 0;
			setTimeout(start, delay);
		}
	}
	slideBox.onmouseover=function(){pause=true;}
	slideBox.onmouseout=function(){pause=false;}
	setTimeout(start, 2000);
}