// JavaScript Document
//<!CDATA[
function g(o){return document.getElementById(o);}
if (document.attachEvent){
  addEvent = function(o,evn,f){o.attachEvent("on"+evn,f)}
}
else if (document.addEventListener){
  addEvent = function(o,evn,f){o.addEventListener(evn,f,false)}
}
/**
 * 功能：选项卡
 * @param {String} nid 导航栏容器的id，导航栏里必须是li，至于是ul还是li就看个人喜好了
 * @param {String} cid 内容容器的id，内容容器里的第一层子节点（排除文本节点）都将作为内容处理
 * @param {String} action 操作，单击或鼠标移动
 * @param {integer} defaultIndex 默认选中第几个选项卡，如果数字非法或者未提供数字则默认第一个
 * @exception 当导航栏和内容数量不对应时抛出错误
 * @author Sheneyan
 */
function initTab(nid,cid,action,defaultIndex){
  var ls = g(nid).getElementsByTagName('li');
  var cc = g(cid).childNodes;
  var c = [];
  var index = defaultIndex?defaultIndex:0;
  for (var i = 0 ; i < cc.length ; i ++)if(cc[i].nodeType==1)c.push(cc[i]);
  if (ls.length!=c.length)
    throw({description:'菜单和内容数量不对应'});
  for (var i = 0 ; i < ls.length ; i ++){
    ls[i].index = i;
    if (i==index){
      ls[i].className = 'hovertab';
      c[i].className = 'dis'
      ls[i].parentNode.last = ls[i];
    }
    addEvent(ls[i],action,function(e){
      var self = window.event?window.event.srcElement:e?e.target:null;
      if (self.parentNode.last){
        self.parentNode.last.className = 'normaltab';
        c[self.parentNode.last.index].className = 'undis';
      };
      self.className = 'hovertab';
      c[self.index].className = 'dis';
      self.parentNode.last = self;
    });
  }
}
//]]>
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function $(id) {
    return document.getElementById(id);
}

function showMenu (baseID, divID) {
    baseID = $(baseID);
    divID  = $(divID);
    if (showMenu.timer) clearTimeout(showMenu.timer);
	hideCur();
    divID.style.display = 'block';
	showMenu.cur = divID;

    if (! divID.isCreate) {
        divID.isCreate = true;
        //divID.timer = 0;
        divID.onmouseover = function () {
            if (showMenu.timer) clearTimeout(showMenu.timer);
			hideCur();
            divID.style.display = 'block';
        };

        function hide () {
            showMenu.timer = setTimeout(function () {divID.style.display = 'none';}, 1000);
        }

        divID.onmouseout = hide;
        baseID.onmouseout = hide;
    }
	function hideCur () {
		showMenu.cur && (showMenu.cur.style.display = 'none');
	}
}