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Js实现类似图片相册左右切换效果

2010-12-29 17:35 1361 查看
<!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" content="text/html; charset=utf-8" />
<title>Js版淘宝图片切换，类似相册播放效果</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>
<!--column-->
<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://www.codefans.net/jscss/demoimg/wall1.jpg" alt="" /></a></li>
<li><a href="#nogo" title="世界风光" target="_blank">
<img src="http://www.codefans.net/jscss/demoimg/wall2.jpg" alt="" /></a></li>
<li><a href="#nogo" title="黄河之谜" target="_blank">
<img src="http://www.codefans.net/jscss/demoimg/wall3.jpg" alt="" /></a></li>
<li><a href="#nogo" title="仅供测试" target="_blank">
<img src="http://www.codefans.net/jscss/demoimg/wall4.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>
<!--column end-->
<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>
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