function $(id) { return document.getElementById(id); }
 
function addBtn() {
 if(!$('ibanner')||!$('ibanner_pic')) return;
 var picList = $('ibanner_pic').getElementsByTagName('a');
 if(picList.length==0) return;
 var btnBox = document.createElement('div');
 btnBox.setAttribute('id','ibanner_btn');
 var SpanBox ='';
 for(var i=1; i<=picList.length; i++ ) {
  var spanList = '<span class="normal">'+i+'</span>';
  SpanBox += spanList;
 }
 btnBox.innerHTML = SpanBox;
 $('ibanner').appendChild(btnBox);
 $('ibanner_btn').getElementsByTagName('span')[0].className = 'current';
 for (var m=0; m<picList.length; m++){
  var attributeValue = 'picLi_'+m
  picList[m].setAttribute('id',attributeValue);
 }
}
function moveElement(elementID,final_x,final_y,interval) {
 if (!document.getElementById) return false;
 if (!document.getElementById(elementID)) return false;
 var elem = document.getElementById(elementID);
 if (elem.movement) {
  clearTimeout(elem.movement);
 }
 if (!elem.style.left) {
  elem.style.left = "0px";
 }
 if (!elem.style.top) {
  elem.style.top = "0px";
 }
 var xpos = parseInt(elem.style.left);
 var ypos = parseInt(elem.style.top);
 if (xpos == final_x  &&  ypos == final_y) {
  moveing = false;
  return true;
 }
 
 elem.style.left = 0 + "px";
 elem.style.top = 0 + "px";

}
function classNormal() {
 var btnList = $('ibanner_btn').getElementsByTagName('span');
 for (var i=0; i<btnList.length; i++){
  btnList[i].className='normal';
 }
}
function picZ() {
 var picList = $('ibanner_pic').getElementsByTagName('a');
 for (var i=0; i<picList.length; i++){
  picList[i].style.zIndex='1';
 }
}
var autoKey = false;
function iBanner() {
 if(!$('ibanner')||!$('ibanner_pic')||!$('ibanner_btn')) return;
 $('ibanner').onmouseover = function(){autoKey = true};
 $('ibanner').onmouseout = function(){autoKey = false};
 var btnList = $('ibanner_btn').getElementsByTagName('span');
 var picList = $('ibanner_pic').getElementsByTagName('a');
 if (picList.length==1) return;
 picList[0].style.zIndex='2';
 for (var m=0; m<btnList.length; m++){
  btnList[m].onmouseover = function() {
   for(var n=0; n<btnList.length; n++) {
    if (btnList[n].className == 'current') {
     var currentNum = n;
    }
   }
   classNormal();
   picZ();
   this.className='current';
   picList[currentNum].style.zIndex='2';
   var z = this.childNodes[0].nodeValue-1;
   picList[z].style.zIndex='3';
   if (currentNum!=z){
    picList[z].style.left='670px';
    moveElement('picLi_'+z,0,0,10);
   }
  }
 } 
}
setInterval('autoBanner()', 1000*10);
function autoBanner() {
 if(!$('ibanner')||!$('ibanner_pic')||!$('ibanner_btn')||autoKey) return;
 var btnList = $('ibanner_btn').getElementsByTagName('span');
 var picList = $('ibanner_pic').getElementsByTagName('a');
 if (picList.length==1) return;
 for(var i=0; i<btnList.length; i++) {
  if (btnList[i].className == 'current') {
   var currentNum = i;
  }
 }
 if (currentNum==(picList.length-1) ){
  classNormal();
  picZ();
  btnList[0].className='current';
  picList[currentNum].style.zIndex='2';
  picList[0].style.zIndex='3';
  picList[0].style.left='670px';
  moveElement('picLi_0',0,0,10);
 } else {
  classNormal();
  picZ();
  var nextNum = currentNum+1;
  btnList[nextNum].className='current';
  picList[currentNum].style.zIndex='2';
  picList[nextNum].style.zIndex='3';
  picList[nextNum].style.left='670px';
  moveElement('picLi_'+nextNum,0,0,10);
 }
}
addBtn();
iBanner();