【relation】
<html>
<head>
<script type="text/javascript" src='http://code.jquery.com/jquery-1.5.2.js'></script>
<script type="text/javascript">
$(document).ready(function(){
$(document).bind("click", function (e) {
$(e.target).closest("span").text("asdf");
});
});
</script>
</head>
<body>
<body>
<div><span>span</span><span>span</span><span>span</span></div>
</body>
</html>
