function getStyle(elem,name){
 var elem = (!elem) ? alert("ERROR: It is short of getStyle==>elem!") : elem;
 var name = (!name) ? alert("ERROR: It is short of getStyle==>name!") : name.toString();
 if((!elem) && (!name)){return false;}
 if(elem.style[name]){ 
  return elem.style[name];
 }else if(elem.currentStyle){ 
  return elem.currentStyle[name];
 }else if(document.defaultView && document.defaultView.getComputedStyle){ 
  name = name.replace(/([A-Z])/g,"-$1"); 
  name = name.toLowerCase();
  var s = document.defaultView.getComputedStyle(elem,""); 
  return s && s.getPropertyValue(name);
 }else{ 
  return null;
 };
}
/* Tween */
var Tween = {
 Expo: {
  easeOut: function(t, b, c, d) {
   return (t == d) ? b + c: c * ( - Math.pow(2, -10 * t / d) + 1) + b;
  }
 }
}
/* zFocus */
var zFocus = function() {
 function init(elem) {
  this.elem = document.getElementById(elem.id);
  this.orien = (!elem.orien) ? 0 : (elem.orien.toString() == "left") ? 0 : (elem.orien.toString() == "top") ? 1 : 0;
  this.time = (!elem.time || (typeof elem.time != "number")) ? 5 : elem.time;
  this.click_key = true;
  this.in_init();
 };
 init.prototype = {
  in_init: function() {
   var ev_height = this.ev_height = parseInt(getStyle(this.elem, "height")),
   ev_width = this.ev_width = parseInt(getStyle(this.elem, "width")),
   banner_ul = this.banner_ul = this.elem.getElementsByTagName("ul")[0],
   total_num = this.n = banner_ul.getElementsByTagName("li").length,
   btn_ul = this.btn_ul = this.elem.getElementsByTagName("ul")[1],
   btn_li = this.btn_li = btn_ul.getElementsByTagName("li"),
   _this = this;
   if (this.orien == 0) {
    banner_ul.style.height = ev_height + "px";
    banner_ul.style.width = (ev_width * total_num) + "px";
   } else if (this.orien == 1) {
    banner_ul.style.height = (ev_height * total_num) + "px";
    banner_ul.style.width = ev_width + "px";
   }
   banner_ul.style.left = 0 + "px";
   banner_ul.style.top = 0 + "px";
   this.index = 0;
   this.creat_btn();
   this.elem.onmouseover = function() {
    clearInterval(_this.a)
   };
   this.elem.onmouseout = function() {
    _this.start();
   };
  },
  start: function() {
   var _this = this;
   this.a = setInterval(function() {
    _this.auto()
   },
   this.time * 2500);
  },
  creat_btn: function() {
   var _this = this;
   for (var i = 0; i < this.n; i++) {
    var newLi = document.createElement("li");
    newLi.innerHTML = i + 1;
    newLi.setAttribute("num", i);
    this.btn_ul.appendChild(newLi);
    this.btn_li[i].onclick = function() {
     if (_this.click_key) {
      var x = parseInt(this.getAttribute("num"));
      clearInterval(_this.a);
      clearInterval(_this.m);
      _this.move(x);
     }
    };
   };
   this.btn_li[0].className = "current";
   this.start();
  },
  auto: function() {
   this.index = (this.index == (this.n - 1)) ? 0 : (this.index + 1);
   this.move(this.index);
  },
  move: function(i) {
   var _this = this;
   var click_key = this.click_key;
   for (var x = 0; x < this.n; x++) {
    this.btn_li[x].className = "";
   };
   this.btn_li[i].className = "current";
   if (this.orien == 0) {
    var t = 0,
    b = parseInt(getStyle(this.banner_ul, "left")),
    c = ( - i * this.ev_width) - b,
    d = 80;
    var m = this.m = setInterval(function() {
     _this.banner_ul.style.left = Math.ceil(Tween.Expo.easeOut(t, b, c, d)) + "px";
     if (t < d) {
      t++;
     } else {
      clearInterval(m);
     }
    },
    10);
   } else if (this.orien == 1) {
    var t = 0,
    b = parseInt(getStyle(this.banner_ul, "top")),
    c = ( - i * this.ev_height) - b,
    d = 80;
    var m = this.m = setInterval(function() {
     _this.banner_ul.style.top = Math.ceil(Tween.Expo.easeOut(t, b, c, d)) + "px";
     if (t < d) {
      t++;
     } else {
      clearInterval(m);
     }
    },
    10);
   };
   this.click_key = click_key;
   this.index = i;
  }
 };
 return init;
} ();