<script type="text/javascript">
$(function() {

$("td").dblclick(function() { //获取标签
var td = $(this);
var itemid=td[0].id;
var txt = td.text();
var input = $("<input type='text' value='" + txt + "'/>");
td.html(input);
input.click(function() { return false; });
//获取焦点
input.trigger("focus");

input.blur(function() {
var newtxt = $(this).val();

if (newtxt != txt) {
td.html(newtxt);
var caid = $.trim(td.prev().text());

/*这里做ajax去后台操作

var url = "?a.php&itemid=" + itemid + "&v=" + newtxt; //具体根据网站情况而定

$.get(url, function(data) {
if(data=="1")
{
location.reload();
td.html(txt);
return;
}
td.html(newtxt);
});

}
else
{
td.html(newtxt);
}
});

*/

});
});
</script>