// tab切换
var $w = window;
var $d = document;
var $l = location;
function $i(s){return $d.getElementById(s);}
function $t(s){return $d.getElementsByTagName(s);}
function $n(s){return $d.getElementsByName(s);}

var _jsc = {};
_jsc.client = (function(){	
	var t = {};
	var b = navigator.userAgent.toLowerCase();
	t.isOpera = (b.indexOf('opera') > -1);
	t.isIE = (!t.isOpera && b.indexOf('msie') > -1);
	t.isFF = (!t.isOpera &&!t.isIE&&b.indexOf('firefox') > -1);
	return t;
})();




_jsc.util = (function(){
	var t = {};
	t.addEvent = function(o,c,h){
		if(_jsc.client.isIE){
			o.attachEvent('on'+c,h);
		}else{
			o.addEventListener(c,h,false);
		}
		return true;
	};
	return t;
})();
_jsc.evt = (function(){
	var t = {};
	t.gTar = function(oe){
		if(_jsc.client.isIE){
			return oe.srcElement;
		}else{
			return oe.target;
		}
	};
	return t;
})();



function tabswitch(c, config){
	this.config = config ? config : {start_delay:3000, delay:1500};
	this.container = $i(c);
	this.pause = false;
	this.nexttb = 1;
	var _this = this;
	this.tabs = this.container.getElementsByTagName('li');
	for(var i = 0; i < this.tabs.length; i++){
		var _ec = this.tabs[i]
		_ec.onmouseover = function(e) {
			_this.pause = true;
			var ev = !e ? window.event : e;
			_this.start(ev, false, null);
		};
		
		_ec.onmouseout = function() {
			_this.pause = false;
		};
		
		try{
			$i(this.tabs[i].id + '_body').onmouseover = function(){
				_this.pause = true;
			};
			
			$i(this.tabs[i].id + '_body').onmouseout = function(){
				_this.pause = false;
			};

			$i(this.tabs[i].id + '_pic').onmouseover = function(){
				_this.pause = true;
			};
			
			$i(this.tabs[i].id + '_pic').onmouseout = function(){
				_this.pause = false;
			};

		}catch(e){}
	}
	
	this.start = function(e, r, n){
		if(_this.pause && !e)return;
		if(r){
			curr_tab = $i(_this.container.id + '_' + rand(4));
		}else{
			if(n){
				//alert(_this.container.id + '_' + _this.nexttb);
				curr_tab = $i(_this.container.id + '_' + _this.nexttb);
			}else{
				curr_tab = _jsc.evt.gTar(e);
				if(curr_tab.id=="")curr_tab = curr_tab.parentNode;
			}
		}
		
		var tb = curr_tab.id.split("_");
		for(var i = 0; i < _this.tabs.length; i++){
			if(_this.tabs[i]==curr_tab){
				_this.tabs[i].className="current";
				try{
					//alert(_this.tabs[i].id);
					$i(_this.tabs[i].id + '_pic').className = "banner_pic current";
					$i(_this.tabs[i].id + '_body').className = "banner_body current";
				}catch(e){}
			}else{
				_this.tabs[i].className="";
				try{
					$i(_this.tabs[i].id + '_pic').className = "banner_pic items";
					$i(_this.tabs[i].id + '_body').className = "banner_body items";
				}catch(e){}
			}
		}
		_this.nexttb = parseInt(tb[tb.length-1]) >= _this.tabs.length ? 1 : parseInt(tb[tb.length-1]) + 1;
	};
}
var banner;
_jsc.util.addEvent(window, 'load', function() {
		banner = new tabswitch('banner', {});
		setInterval("banner.start(null, null, 1);", 9000);
});