closest 用法

<table>

<tr>

<td><span onclick="ceshi(this)">ceshi</span></td>

</tr>

</table>

<script>

function ceshi(obj){

var cs = $(obj.).closest("table");

alert(cs.html());

}

</script>

<!--隔行换色-->

$("table").delegate("tr","mouseover",function(){
$(this).addClass("over");
}).delegate("tr","mouseout",function(){
$(this).removeClass("over");
});