图片左右滚动效果
一个图片左右滚动的效果，如果滚动到结尾或者开头时，再点击切换则切换到第一张后缀最后一张，省略中间图片的滚动，直接是首位２张图片滚动的效果。
源代码如下
<!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>图片左右滚动效果</title>
<style type="text/css">
.newlistdiv { width:565px; height:200px; padding:0 40px; position:relative; float:left;}
.newlistdiv .btnLeft { width:25px; height:40px; background:url(images/btnLeft.jpg) no-repeat; position:absolute; left:0px; top:80px;}
.newlistdiv .btnRight { width:25px; height:40px; background:url(images/btnRight.jpg) no-repeat; position:absolute; right:0px; top:80px;}
.newcnt { width:565px; height:200px; position:relative; overflow:hidden; }
.newcnt .newlist { width:800%; height:200px; position:absolute; top:0; left:0;}
.newlist .newtextall { width:565px; float:left; position:relative; z-index:0;height:200px;}
</style>
<script type="text/javascript" src="http://cdn.bootcss.com/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript">
jQuery(function () {
jQuery.fn.news = function (parent_div, page_size) {
var positionleft = 0;
var o = jQuery(this).find(parent_div);
var w = o.width();
var showbox = jQuery(this).find('.newlist');
var len = showbox.find('.newtextall').length;
var page_count = Math.ceil(len / page_size);
showbox.width(w * page_count);
var midItem = showbox.find('.newtextall').slice(1, len - 1); //中间元素
midItem.css('font-weight', 'bold')
//向左滚动
jQuery(this).find('.btnLeft').click(function () {
if (!showbox.is(':animated')) {
if (positionleft == 0) {
positionleft = positionleft - w * (page_count - 1);
midItem.hide(); //隐藏中间的
showbox.animate({
left: -w
}, 500, function () { showbox.css('left', positionleft); midItem.show(); /*动画结束后再显示出来*/ });
} else {
positionleft = positionleft + w
showbox.animate({
left: positionleft
}, 500);
}
}
});
//向右滚动
jQuery(this).find('.btnRight').click(function () {
if (!showbox.is(':animated')) {
if (positionleft == -w * (page_count - 1)) {
positionleft = 0;
midItem.hide(); //隐藏中间的
showbox.css('left', -w); //要重设left的位置
showbox.animate({
left: 0
}, 500, function () { midItem.show(); });
} else {
positionleft = positionleft - w;
showbox.animate({
left: positionleft
}, 500);
}
}
});
}
jQuery(".newlistdiv").each(function () { jQuery(this).news('.newcnt', 1); });
})
</script>
</head>
<body>
<div class="newlistdiv">
<div class="btnLeft">L</div>
<div class="btnRight">R</div>
<div class="newcnt">
<div class="newlist">
<div class="newtextall" style="background:#666666">
1
</div>
<div class="newtextall" style="background:#777777">2
</div>
<div class="newtextall" style="background:#888888">3
</div>
<div class="newtextall" style="background:#999999">4
</div>
<div class="newtextall" style="background:#aaaaaa">5
</div>
</div>
</div>
</div>
</body>
</html>
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