效果如下：
代码如下：
<!DOCTYPE HTML>
<html>
<head>
<meta charset="UTF-8">
<title>p横向拖拽排序</title>
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
<style type="text/css">
body, p {
padding: 0px;
margin: 0px;
}
.box {
position: relative;
margin-left: 15px;
padding: 10px;
padding-right: 0px;
width: 810px;
border: blue solid 1px;
}
.box ul{
list-style: none;
overflow: hidden;
padding: 0;
margin:0;
}
.drag {
float: left;
border: #000 solid 1px;
text-align: center;
}
.box ul li a{
display: block;
padding: 10px 25px;
}
.drag-dash {
position: absolute;
border: #000 solid 1px;
background: #ececec;
}
.dash {
float: left;
border: 1px solid transparent;
}
</style>
</head>
<body>
<h1>p横向拖拽排序</h1>
<p class="box">
<ul>
<li class="drag"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >导航一</a></li>
<li class="drag"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >导航二导航</a></li>
<li class="drag"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >导航导航导航三</a></li>
<li class="drag"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >导航导航四</a></li>
<li class="drag"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >导五</a></li>
</ul>
</p>
<script type="text/javascript">
$(document).ready(function () {
var range = {x: 0, y: 0};//鼠标元素偏移量
var lastPos = {x: 0, y: 0, x1: 0, y1: 0}; //拖拽对象的四个坐标
var tarPos = {x: 0, y: 0, x1: 0, y1: 0}; //目标元素对象的坐标初始化
var thep = null, move = false;
var choose = false; //拖拽对象 拖拽状态 选中状态
var thepId = 0, thepHeight = 0, thepHalf = 0;
var tarFirstY = 0; //拖拽对象的索引、高度、的初始化。
var tarp = null, tarFirst, tempp; //要插入的目标元素的对象, 临时的虚线对象
var initPos = {x: 0, y: 0};
var thepWidth;//拖拽对象的宽度
$(".drag").each(function () {
$(this).mousedown(function (event) {
choose = true;
//拖拽对象
thep = $(this);
//记录拖拽元素初始位置
initPos.x = thep.position().left;
initPos.y = thep.position().top;
//鼠标元素相对偏移量
range.x = event.pageX - thep.position().left;
range.y = event.pageY - thep.position().top;
thepId = thep.index();
thepWidth = thep.width();
thepHalf = thepWidth / 2;
thep.removeClass("drag");
thep.addClass("drag-dash");
thep.css({left: initPos.x + 'px', top: initPos.y + 'px'});
// 创建新元素 插入拖拽元素之前的位置(虚线框)
$("<p class='dash'></p>").insertBefore(thep);
tempp = $(".dash");
$(".dash").css("width" , thepWidth);
return false
});
});
$(document).mouseup(function (event) {
if (!choose) {
return false;
}
if (!move) {
//恢复对象的初始样式
thep.removeClass("drag-dash");
thep.addClass("drag");
tempp.remove(); // 删除新建的虚线p
choose = false;
return false;
}
thep.insertBefore(tempp); // 拖拽元素插入到 虚线p的位置上
//恢复对象的初始样式
thep.removeClass("drag-dash");
thep.addClass("drag");
tempp.remove(); // 删除新建的虚线p
move = false;
choose = false;
return false
}).mousemove(function (event) {
if (!choose) {return false}
move = true;
lastPos.x = event.pageX - range.x;
lastPos.y = event.pageY - range.y;
lastPos.x1 = lastPos.x + thepWidth;
// 拖拽元素随鼠标移动
thep.css({left: lastPos.x + 'px', top: lastPos.y + 'px'});
// 拖拽元素随鼠标移动 查找插入目标元素
var $main = $('.drag'); // 局部变量：按照重新排列过的顺序 再次获取 各个元素的坐标，
$main.each(function () {
tarp = $(this);
tarPos.x = tarp.position().left;
tarPos.y = tarp.position().top;
tarPos.x1 = tarPos.x + tarp.width() / 2;
tarFirst = $main.eq(0); // 获得第一个元素\
tarFirstX = tarFirst.position().left + thepHalf; // 第一个元素对象的中心纵坐标
//拖拽对象 移动到第一个位置
if (lastPos.x <= tarFirstX) {
tempp.insertBefore(tarFirst);
}
//判断要插入目标元素的 坐标后， 直接插入
if (lastPos.x >= tarPos.x - thepHalf && lastPos.x1 >= tarPos.x1) {
tempp.insertAfter(tarp);
}
});
return false
});
});
</script>
</body>
</html>
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