jquery中在一个click事件中，.ajax重复执行两次 - Web 开发 / Ajax
激发了一次$("#qdanswersubmit").click(submitAnswer)事件，可是在函数submitAnswer中，不知道为什么.ajax运行了两次。
js源代码如下：
$(document).ready(function () { initControls(); bindEvents();});function initControls() { $(".qduesfulmesg").hide(); $("#qdanswersubmit").attr({ "disabled": "disabled" });}function bindEvents() { //submit the answer $("#qdanswersubmit").click(submitAnswer); $("#qdanswertext").keyup(checkContent);}function submitAnswer() { $.ajax({ url: "SubmitAnswer.ashx", cache: false, type: "POST", dataType: "json", data: { content: $("#qdanswertext").val() }, success: submitSuccess, error: ajaxError });}//post ajax occure an errorfunction ajaxError() { $.blockUI({ message: '<img src="../images/handle/Failed.png" /><h2 class="ajaxmsg">Ajax Request Failed!</h2>' }); setTimeout($.unblockUI, 1500);}function submitSuccess(data) { var answer = ""; var value = $("#qdanswerscount").text(); if (data != null) { if (value != 0) { answer += "<hr style='margin-top: 3px; margin-bottom: 3px; width:80%' />"; } answer += "<div class='qdansweruseful' style='display: block; float: left; color: #808185; text-align: center; font-size: 30px; margin-top: 5px; margin-left: 15px;'>"; answer += "<img width='36px' height='28px' id='qdanswer_useful" + data.aid; answer += "' src='../images/handle/arrow.png' title='This is your answer, you cann't click again to undo' alt='" + data.aid; answer += "' class='.qdcontent_useful' style='cursor: pointer' />" answer += "<div style='text-align: center'><label id='qdanswer_usefulcount" + data.aid + "' "; answer += "style='display: block; padding-top: 5px;'>"; answer += "0</label></div></div>"; answer += "<div class='qdcontent_main'><div class='qduesfulmesg' id='qduesfulmesg" + data.aid + "'>"; answer += "<label>Is it useful for you?</label><br /><input class='qdanswer_addsubmit' id='qdanswer_adduseful" + data.aid + "' type='button' value='Yes' name='" + data.aid + "'/>"; answer += "<input class='qd_addsubmit' id='qdanswer_canceluseful" + data.aid + "' type='button' value='No' /></div>"; answer += "<span id='qdcontent_text'>" + $("#qdanswertext").val() + "</span><span class='qdcontent_tag'><label for='qdcontenttag' class='qdlabel'>Tags: </label><label id='qdcontenttag'>" + data.tag; answer += "</label></span>"; answer += "<span class='qdcontent_tag'><label for='qdcontentdate' class='qdlabel'>Publishdate: </label><label id='qdcontentdate'>" + data.date; answer += "</label></span>"; answer += "<span class='qdcontent_tag'><label for='qdcontentquestioner' class='qdlabel'>Responder: </label><label id='qdcontentquestioner'>" + data.uid; answer += "</label></span></div>"; $(".qdmesgcontent").append(answer); value = parseInt(value) + 1; $("#qdanswerscount").text(value); $(".qduesfulmesg").hide(); $("#qdanswertext").text(""); } else { $.blockUI({ message: '<img src="../Images/handle/Failed.png" /><h2 class="ajaxmsg">Post failed, please sign in firstly!</h2>' }); setTimeout($.unblockUI, 4500); } $("#qdanswersubmit").attr({ "disabled": "disabled" });}function checkContent() { var len = $("#qdanswertext").val().length; $("#qdanswererrormesg").empty(); if (len == 0) { $("#qdanswererrormesg").append("Please enter the answer firstly."); $("#qdanswersubmit").attr({ "disabled": "disabled" }); } else { $("#qdanswersubmit").removeAttr("disabled"); }}