var transitionstext = new array;
transitionstext[0] = "progid:dximagetransform.microsoft.gradientwipe(duration=0.5)"; /** 从左往右渐变出 */
transitionstext[1] = "progid:dximagetransform.microsoft.fade(duration=1)"; /** 整体渐变出 */
transitionstext[2] = "progid:dximagetransform.microsoft.blinds(duration=0.7,bands=20)"; /** 横向百叶窗 */
transitionstext[3] = "progid:dximagetransform.microsoft.checkerboard(duration=0.7,squaresx=20,squaresy=20)"; /** 方块百叶窗 */
transitionstext[4] = "progid:dximagetransform.microsoft.randomdissolve(duration=0.7,orientation=vertical)"; /** 随机点 */
transitionstext[5] = "progid:dximagetransform.microsoft.randombars(duration=0.7,orientation=vertical)"; /** 随机竖线 */

var maximg;
var nowimg = 1;
var begin;
var interval = 4000;  /** 切换间隔 */
var hasnum=false;  /** 是否有数字快捷切换的判断 */

function initmax(){  /** 修正总数并触发动作 */
  for (var i=1;i<=20;i++){
    if(!document.getelementbyid("pichdp"+i)){
      maximg=i-1;
      break;
    }else{
      addmouseactions(document.getelementbyid("pichdp"+i));
    }
  }  

  if(document.getelementbyid("num1")) hasnum=true;
  if(maximg > 0)
    playit();  /**   第一次开始计时 */
}

function initialization(){   /**  自动切换 */
  if(nowimg == maximg) 
    next = 1;
  else
   next = nowimg + 1;

  document.getelementbyid("pichdp" + next).style.display="";
  filtershowit(document.getelementbyid("pichdp" + next));
  document.getelementbyid("pichdp" + nowimg).style.display="none";

  if(hasnum) {
    for (var i=1;i<=maximg;i++){
       document.getelementbyid("num"+i).classname="link";
      if(i == next){
        document.getelementbyid("num"+i).classname="current";
      }
    }      
  }

  if(nowimg == maximg) 
    nowimg = 1;
  else
    nowimg++;    

  playit();    /**  新的计时 */

}

function showit(x){    /**   手动切换 */
  if(nowimg==x)return;
  if(maximg > 1){
    stopit();
    for (var i=1;i<=maximg;i++){
      document.getelementbyid("pichdp" + i).style.display="none";
      if(hasnum)
        document.getelementbyid("num"+i).classname="link";
      if(i == x){
        document.getelementbyid("pichdp" + i).style.display="block";
        if(hasnum)
          document.getelementbyid("num"+i).classname="current";
        filtershowit(document.getelementbyid("pichdp" + i));
      }    
    }  
    nowimg=x;
  }
}

function playit(){  /**  重新开始自动计时 */
  if(maximg > 1){
    cleartimeout(begin); 
    begin = settimeout('initialization()', interval);  
  }
}

function stopit(){   /**  停止计时 */
  if(maximg > 1)
    cleartimeout(begin); 
}

function filtershowit(crosstick){    /**  添加切换的滤镜效果 */
  if(document.body.getattribute('cms:paflag') )return;
  if (!crosstick.filters)return;
  var innerhtml = crosstick.innerhtml;
  crosstick.innerhtml="";
  crosstick.style.filter=transitionstext[math.floor(math.random() * (transitionstext.length))];
  crosstick.filters[0].apply();
  crosstick.innerhtml =innerhtml; 
  crosstick.filters[0].play();
}

function addmouseactions(obj){  /**  给对象增加鼠标事件：移入停止、移出开始 */
  obj.onmouseover=function(){
    stopit();
  }

  obj.onmouseout=function(){
    playit();
  }
}

if(document.all)
window.attachevent('onload',initmax);
else
window.addeventlistener('load',initmax,false);