cusor为move表示光标为move类型，cursorAt指示光标所在的位置。当删除了拖拽功能后，必须要再次调用draggable()才能继续使用拖拽
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script src="../public/js/jquery-1.8.3.js"></script>
<script src="../public/js/jquery-ui-1.10.4.custom.js"></script>
<script src="../public/js/jquery-ui.js"></script>
<title>拖放功能</title>
<style type="text/css">
#draggable{width: 150px;height: 150px;background-color: #990}
</style>
<script type="text/javascript">
$(document).ready(function(){
//使用draggable初始化拖放功能
$("#draggable").draggable({cusor:"move",cursorAt:{top:56,left:56}});
$("#btnenable").click(function(e){
$("#draggable").draggable("enable");
});
$("#btndisable").click(function(e){
$("#draggable").draggable("disable");
});
$("#btndestroy").click(function(e){
$("#draggable").draggable("destroy");
});
});
</script>
</head>
<body>
<button id="btnenable">允许拖放</button>
<button id="btndisable">禁止拖放</button>
<button id="btndestroy">删除拖放功能</button>
<div id="draggable" class="ui-widget-content">
<p>click here to drag</p>
</div>
</body>
</html>原文：http://blog.csdn.net/colorsunlight/article/details/44649375