var lastFaqClick=null;
window.onload=function(){
  var faq=document.getElementById("faq");
  var dls=faq.getElementsByTagName("dl");
  for (var i=0,dl;dl=dls[i];i++){
    var dt=dl.getElementsByTagName("dt")[0];//取得标题
     dt.id = "faq_dt_"+(Math.random()*100);
     dt.onclick=function(){
       var p=this.parentNode;//取得父节点
        if (lastFaqClick!=null&&lastFaqClick.id!=this.id){
          var dds=lastFaqClick.parentNode.getElementsByTagName("dd");
          for (var i=0,dd;dd=dds[i];i++)
            dd.style.display='none';
        }
        lastFaqClick=this;
        var dds=p.getElementsByTagName("dd");//取得对应子节点，也就是说明部分
        var tmpDisplay='none';
        if (gs(dds[0],'display')=='none')
          tmpDisplay='block';
        for (var i=0;i<dds.length;i++)
          dds[i].style.display=tmpDisplay;
      }
  }
}
function gs(d,a){
  if (d.currentStyle){
    var curVal=d.currentStyle[a]
  }else{
    var curVal=document.defaultView.getComputedStyle(d, null)[a]
  }
  return curVal;
}
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];}
}