// 属性设置
var E_strIFaderTransType     = 'reveal'; // 'reveal' | 'blend'
var Filter_number    = 23;       // 滤镜种数
var change_time = 1.000;    // 滤镜转换过程为3.0秒延迟
var wait_time    = 4000;     // 两种滤镜之间为5秒延迟

var obj_Timer;
var count_temp = 0; //记录当前是第几幅图片
var Img_arry = new Array(); //图片数组
var E_ie4 = document.all?true:false;
var E_nn4 = document.layers?true:false;

function Filt_set() //设置滤镜
{
 if(!E_ie4 && !E_nn4) return;
 if(E_ie4) {
  var theImg = document.all['idImgFading'];
  if(theImg == null) return;
  with(document.all['idImgFading']) {
   style.filter = (E_strIFaderTransType == 'reveal')?'revealTrans':'blendTrans';
   style.filter.duration = change_time;
   style.filter.transition = Filter_number;
  }
 }
 obj_Timer = window.setInterval('use_Filter()',wait_time);
}

function use_Filter() //滤镜的启动
{
 if(E_ie4) {
  with(document.all['idImgFading']) {
   if(E_strIFaderTransType == 'reveal') {
    filters(0).transition = Filter_number;
   }
   if(count_temp == (Img_arry.length - 1)) {
    count_temp = -1;
   }
   count_temp++;
   title = Img_arry[count_temp].sAlt;
 
   filters(0).apply();
   src = Img_arry[count_temp].sImgUrl;
   filters(0).play();
  }
 }
 else if(E_nn4) {
  if(count_temp == (Img_arry.length - 1)) {
   count_temp = -1;
  }
  count_temp++;
  document.images['idImgFading'].src = Img_arry[count_temp].sImgUrl;
 }
}

function obj_ClearTime() {
 window.clearInterval(obj_Timer);
}
window.onunload = obj_ClearTime;//取消计时器，释放系统资源

function Img_obj(sImgUrl,command,sAlt,sTarget) 
{
 this.sImgUrl = (sImgUrl == null)?'':sImgUrl;
 this.command = (command == null || command == '')?'/':command;
 this.sAlt = (sAlt == null)?'':sAlt;
 this.sTarget = (sTarget == null || sTarget == '')?'_self':sTarget;
}