var Switcher = new Array();
var isIE = navigator.appVersion.indexOf("MSIE") != -1 ? true:false;
var TimeOutaa = 5000;   //每张图切换时间 (单位毫秒);
var adNum = 0;
var theTimer;
var whichlink;

function jdturl() {
  window.open (Switcher[whichlink]["link"]);
}

function chagncssname(nnn){//小图当前图片的样式
  for (var i = 1; i < Switcher.length; i++){
    $(switch_navSt + i).className = switch_navOf;
  }
  $(switch_navSt + nnn).className = switch_navOn;
}

function playTran(){
  if (isIE){
    imgInit.filters.BlendTrans.play();
  }
}

function nextAd(){  //页面打开时大图的切换
  if(adNum < (Switcher.length-1)){
    adNum++;
  }else{
    adNum = 1;
  }
  if(document.all){
    //imgInit.filters.BlendTrans.Transition=23;
    imgInit.filters.BlendTrans.apply();
    playTran();
  }
  whichlink = adNum;
  chagncssname(adNum);
  document.images.imgInit.src = Switcher[adNum]["img"];
  document.images.imgInit.title = Switcher[adNum]["title"];
  $(switch_txtid).title = Switcher[adNum]["title"];
  if (Switcher[adNum]["link"] == "") {
    $(switch_txtid).innerHTML = Switcher[adNum]["title"];
  } else {
    var outtxt = "<a href=\"" + Switcher[adNum]["link"] + "\" target=\"_blank\">";
    outtxt += Switcher[adNum]["title"] + "</a>";
    $(switch_txtid).innerHTML = outtxt;
  }
  theTimer = setTimeout("nextAd()", TimeOutaa);
}

function stopnextad(nnn){  //停在滚动层时滚动层停止滚动程序
  $(switch_navSt + nnn).className = switch_navOn;
  clearTimeout(theTimer);
}

function startnextad(){  //移出滚动层时滚动层开始滚动程序
  chagncssname(adNum);
  theTimer = setTimeout("nextAd()", TimeOutaa);
}

function nextAdonclick(nn){   //点击小图的切换
  adNum = nn;
  if(document.all){
    //imgInit.filters.BlendTrans.Transition=23;
    imgInit.filters.BlendTrans.apply();
    playTran();
  }
  whichlink = adNum;
  chagncssname(adNum);
  document.images.imgInit.src = Switcher[adNum]["img"];
  document.images.imgInit.title = Switcher[adNum]["title"];
  $(switch_txtid).title = Switcher[adNum]["title"];
  if (Switcher[adNum]["link"] == "") {
    $(switch_txtid).innerHTML = Switcher[adNum]["title"];
  } else {
    var outtxt = "<a href=\"" + Switcher[adNum]["link"] + "\" target=\"_blank\">";
    outtxt += Switcher[adNum]["title"] + "</a>";
    $(switch_txtid).innerHTML = outtxt;
  }
}

function loadSwitch() {
  var outimg, outtxt;
  var outnav = "<ul>";
  for(var i = 1; i<Switcher.length; i++){
    outnav += "<li id=\"" + switch_navSt + i + "\" onclick=\"nextAdonclick(" + i;
    outnav += ")\" class=\"" + switch_navOf + "\"><img src=\"" + Switcher[i]["img"];
    outnav += "\" onmouseover=\"stopnextad(" + i + ")\" onmouseout=\"startnextad()\"></li>";
  }
  outnav += "</ul>";
  outimg = "<img name=\"imgInit\" src=\"" + Switcher[1]["img"] + "\" alt=\"" + Switcher[1]["title"];
  outimg += "\" onclick=\"jdturl()\" style=\"cursor:pointer;FILTER: BlendTrans(Duration=1);\" />";
  if (Switcher[1]["link"] == "") {
    outtxt = Switcher[1]["title"];
  } else {
    outtxt = "<a href=\"" + Switcher[1]["link"] + "\" target=\"_blank\">" + Switcher[1]["title"] + "</a>";
  }
  $(switch_imgid).innerHTML = outimg;
  $(switch_txtid).innerHTML = outtxt;
  $(switch_navid).innerHTML = outnav;
  nextAd();
}