js函数必须在alert某元素执行后才能执行

$.post("queryAllPipe.do", function(list){
$("#pipeVisual").children().remove();
var tbody = "";
$.each(list, function(n, value) {
var trs = "";
trs += " <tr> <td> " + value.id + " </td> <td>" + value.pipeModelNumber + "</td><td>" +
value.pipeStandard + "</td><td>" + value.pipeAmount + "</td>" +
"<td><div class='btn-group'><a href='#' class='btn btn-default'>修改</a><a href='#' class='btn btn-danger' name='deletePipe'>删除</a></div></td>" + "</tr>";
tbody += trs;
});
$("#pipeVisual").append(tbody);
});

alert($("[name='deletePipe']"));
//下面的事件必须在上面alert一下ajax动态添加的元素才能注册执行
$("[name='deletePipe']").on("click", function(){

var tr1 = $(this).parents("tr:first");
var pipeId = tr1.find("td:first-child").text();	//获取要删除订单的钢管id
$.post("deletePipe.do", {pipeId:pipeId}, function(e){
tr1.remove();
});
});