Js版淘宝图片切换，类似相册播放效果_图片特效特效

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Js版淘宝图片切换，类似相册播放的效果，没有使用jQuery，请朋友们注意，代码初次写成，未经重新优化及整理，希望大家继续修正。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" mrc="text/html; charset=utf-8" />
<title>淘宝图片切换</title>
<style type="text/css">
* {margin:0; padding:0; vertical-align:top;}
img{border:0 none}
.photo{ width:736px; height:213px; overflow:hidden; position:relative}
.photo .step{ position:absolute; bottom:10px;right:15px; height:23px; z-index:2; color:#fff; font-size:14px; font-weight:bold;vertical-align:middle; cursor:pointer}
.photo .step em{ margin:0 5px}
.photo ul{ float:left; position:absolute;top:0;left:0;width:2208px}
.photo li{ float:left;background:#09e; }
.photo li img{ display:block;width:736px;height: 213px; }
</style>
</head>
<body>

<div class="column">
	<div class="photo" id="photo">
		<ul class="clear" id="photo-sub" style="width:2944px">
		<li><a href="#nogo" title="四季如春" target="_blank"><img src="http://p1.mb5u.com/texiao/1/20110225160546572.jpg" alt="" /></a></li>
		<li><a href="#nogo" title="世界风光" target="_blank"><img src="http://p1.mb5u.com/texiao/1/20110225160546573.jpg" alt="" /></a></li>
		<li><a href="#nogo" title="黄河之谜" target="_blank"><img src="http://p1.mb5u.com/texiao/1/20110225160546574.jpg" alt="" /></a></li>
  <li><a href="#nogo" title="仅供测试" target="_blank"><img src="http://p1.mb5u.com/texiao/1/20110225160546575.jpg" alt="" /></a></li>
		</ul>
		<div class="step" id="step-num"><span>上一页</span><em>1</em>/<em>3</em><span>下一页</span></div>
	</div>
</div>

<script type="text/javascript">
function photoAlbumn(photoObj,btnObj,numObj){
var moveNum = 1,
 _void=true,
 cloneObj,nums,
 voidClone=false,
 d=document,
 elem = d.getElementById(photoObj),
 btnObj=d.getElementById(btnObj),
 numObj=d.getElementById(numObj);
if (!elem) return false;
if (!btnObj) return false;
var elemObj = elem.getElementsByTagName("li"),
 autoWidth = elemObj[0].offsetWidth,
 btns = btnObj.getElementsByTagName("span"),
 max=elemObj.length;
 elem.style.width = (max+1)*autoWidth + "px";
var numElement =function(){
if(numObj){
 nums = numObj.getElementsByTagName("em");
 nums[1].innerHTML = max;
 nums[0].innerHTML = moveNum;
 }
}
var moveElement =function(final_x,final_y,interval){
 _void = false;
 var step = function () {
  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);
  //alert(xpos)
  if (xpos == final_x && ypos == final_y) {
   _void = true;
if(voidClone){
  elem.style.left = (moveNum > 2)?(-(max-1)*autoWidth +"px"):"0px";
  elem.removeChild(cloneObj);
  voidClone = false;
 }
   return true;
  }
  if (xpos < final_x) {
    var dist = Math.ceil((final_x - xpos)/10);
    xpos = xpos + dist;
  }
  if (xpos > final_x) {
    var dist = Math.ceil((xpos - final_x)/10);
    xpos = xpos - dist;
  }
  if (ypos < final_y) {
    var dist = Math.ceil((final_y - ypos)/10);
    ypos = ypos + dist;
  }
  if (ypos > final_y) {
    var dist = Math.ceil((ypos - final_y)/10);
    ypos = ypos - dist;
  }
  elem.style.left = xpos + "px";
  elem.style.top = ypos + "px";
  elem.movement = setTimeout(function(){step()},interval);
}
 elem.movement = setTimeout(function(){step()},interval);
} ;
var moveAutoShow = function (){
	moveNum++;
 if(moveNum > max){
  cloneObj = elemObj[0].cloneNode(true);
  elem.appendChild(cloneObj);
  voidClone = true;
 }
	moveElement(-autoWidth*(moveNum-1),0,5);
 if(moveNum > max) moveNum=1;
 numElement();
};
var prepareSlideshow = function (){
	var moveAuto = setInterval(function(){moveAutoShow()},5000);
	btns[0].onmousedown = function() {
  if(!_void) return false;
		clearInterval(moveAuto);
		moveNum--;
    if(moveNum < 1){
  cloneObj = elemObj[(max-1)].cloneNode(true);
  cloneObj.style.cssText=";position:absolute;left:-" + autoWidth +"px";
  elem.insertBefore(cloneObj,elemObj[0]);
  voidClone = true;
 }
		moveElement(-autoWidth*(moveNum-1),0,5);
		moveAuto = setInterval(function(){moveAutoShow()},5000);
  	if(moveNum < 1) moveNum=max;
  numElement();
	}
	btns[1].onmousedown = function() {
  if(!_void) return false;
		clearInterval(moveAuto);
		moveNum++;
   if(moveNum > max){
  cloneObj = elemObj[0].cloneNode(true);
  elem.appendChild(cloneObj);
  voidClone = true;
 }
		moveElement(-autoWidth*(moveNum-1),0,5);
		moveAuto = setInterval(function(){moveAutoShow()},5000);
  if(moveNum > max) moveNum=1;
  numElement();
	}
};
numElement();
prepareSlideshow();
}
photoAlbumn("photo-sub","photo","step-num");
</script>
</body>
</html>

所属频道：图片特效特效/更新时间：2012-11-23

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