function ZoomPic ()
{
this.initialize.apply(this, arguments)
}
ZoomPic.prototype =
{
initialize : function (id)
{
var _this = this;
this.wrap = typeof id === "string" ? document.getElementById(id) : id;
this.oUl = this.wrap.getElementsByTagName("ul")[0];
this.aLi = this.wrap.getElementsByTagName("li");
this.prev = this.wrap.getElementsByTagName("pre")[0];
this.next = this.wrap.getElementsByTagName("pre")[1];
this.timer = null;
this.aSort = [];
this.iCenter = 2;
this._doPrev = function () {return _this.doPrev.apply(_this)};
this._doNext = function () {return _this.doNext.apply(_this)};
this.options = [
{width:476, height:210, top:40, left:0, zIndex:1},
{width:426, height:250, top:20, left:50, zIndex:2},
{width:654, height:290, top:0, left:150, zIndex:3},
{width:426, height:250, top:20, left:480, zIndex:2},
{width:476, height:210, top:40, left:476, zIndex:1},
];
for (var i = 0; i < this.aLi.length; i++) this.aSort[i] = this.aLi[i];
this.aSort.unshift(this.aSort.pop());
this.setUp();
this.addEvent(this.prev, "click", this._doPrev);
this.addEvent(this.next, "click", this._doNext);
this.doImgClick();
this.timer = setInterval(function ()
{
_this.doNext()
}, 3000);
this.wrap.onmouseover = function ()
{
clearInterval(_this.timer)
};
this.wrap.onmouseout = function ()
{
_this.timer = setInterval(function ()
{
_this.doNext()
}, 3000);
}
},
doPrev : function ()
{
this.aSort.unshift(this.aSort.pop());
this.setUp()
},
doNext : function ()
{
this.aSort.push(this.aSort.shift());
this.setUp()
},
doImgClick : function ()
{
var _this = this;
for (var i = 0; i < this.aSort.length; i++)
{
this.aSort[i].onclick = function ()
{
if (this.index > _this.iCenter)
{
for (var i = 0; i < this.index - _this.iCenter; i++) _this.aSort.push(_this.aSort.shift());
_this.setUp()
}
else if(this.index < _this.iCenter)
{
for (var i = 0; i < _this.iCenter - this.index; i++) _this.aSort.unshift(_this.aSort.pop());
_this.setUp()
}
}
}
},
setUp : function ()
{
var _this = this;
var i = 0;
for (i = 0; i < this.aSort.length; i++) this.oUl.appendChild(this.aSort[i]);
for (i = 0; i < this.aSort.length; i++)
{
this.aSort[i].index = i;
if (i < 5)
{
this.css(this.aSort[i], "display", "block");
this.doMove(this.aSort[i], this.options[i], function ()
{
_this.doMove(_this.aSort[_this.iCenter].getElementsByTagName("img")[0], {opacity:100}, function ()
{
_this.doMove(_this.aSort[_this.iCenter].getElementsByTagName("img")[0], {opacity:100}, function ()
{
_this.aSort[_this.iCenter].onmouseover = function ()
{
_this.doMove(this.getElementsByTagName("div")[0], {bottom:0})
};
_this.aSort[_this.iCenter].onmouseout = function ()
{
_this.doMove(this.getElementsByTagName("div")[0], {bottom:-100})
}
})
})
});
}
else
{
this.css(this.aSort[i], "display", "none");
this.css(this.aSort[i], "width", 0);
this.css(this.aSort[i], "height", 0);
this.css(this.aSort[i], "top", 37);
this.css(this.aSort[i], "left", this.oUl.offsetWidth / 2)
}
if (i < this.iCenter || i > this.iCenter)
{
this.css(this.aSort[i].getElementsByTagName("img")[0], "opacity", 100)
this.aSort[i].onmouseover = function ()
{
_this.doMove(this.getElementsByTagName("img")[0], {opacity:100})
};
this.aSort[i].onmouseout = function ()
{
_this.doMove(this.getElementsByTagName("img")[0], {opacity:100})
};
this.aSort[i].onmouseout();
}
else
{
this.aSort[i].onmouseover = this.aSort[i].onmouseout = null
}
}
},
addEvent : function (oElement, sEventType, fnHandler)
{
return oElement.addEventListener ? oElement.addEventListener(sEventType, fnHandler, false) : oElement.attachEvent("on" + sEventType, fnHandler)
},
css : function (oElement, attr, value)
{
if (arguments.length == 2)
{
return oElement.currentStyle ? oElement.currentStyle[attr] : getComputedStyle(oElement, null)[attr]
}
else if (arguments.length == 3)
{
switch (attr)
{
case "width":
case "height":
case "top":
case "left":
case "bottom":
oElement.style[attr] = value + "px";
break;
case "opacity" :
oElement.style.filter = "alpha(opacity=" + value + ")";
oElement.style.opacity = value / 100;
break;
default :
oElement.style[attr] = value;
break
}
}
},
doMove : function (oElement, oAttr, fnCallBack)
{
var _this = this;
clearInterval(oElement.timer);
oElement.timer = setInterval(function ()
{
var bStop = true;
for (var property in oAttr)
{
var iCur = parseFloat(_this.css(oElement, property));
property == "opacity" && (iCur = parseInt(iCur.toFixed(2) * 100));
var iSpeed = (oAttr[property] - iCur) / 5;
iSpeed = iSpeed > 0 ? Math.ceil(iSpeed) : Math.floor(iSpeed);
if (iCur != oAttr[property])
{
bStop = false;
_this.css(oElement, property, iCur + iSpeed)
}
}
if (bStop)
{
clearInterval(oElement.timer);
fnCallBack && fnCallBack.apply(_this, arguments)
}
}, 30)
}
};
window.onload = function ()
{
new ZoomPic("Index_Box");
};