[英]Input type text value cannot be updated via jQuery
下面是 html、jQuery、servlet 中的簡單需求
實現:忘記密碼模塊
我的感覺是,文本字段已更新並刷新為舊值。 所以就我而言,
步驟 1) 文本值 - 占位符屬性值
第 2 步)從 jQuery 更新
步驟 3) 再次刷新為占位符屬性值
jQuery
$(document).on("click", "#btnuserName", function() {
$.post("/zmcwebadmin/ForgotPasswordServlet",function(securityQuestion) {
alert("I got the response in ajax "+ securityQuestion);//value is correct
$("input[type=text].txt_securityQuestion").val(securityQuestion); //problem here
console.log("txt_securityQuestion");
});
});
html
<input type="text" id="ForgotPassUname" name="user_name" class="changepassformat"placeholder="Enter Username">
<button class="buttonformat" id="btnuserName" name="btnuserName">SEND</button><br>
<input type="text" id="txt_securityQuestion" name="txt_securityQuestion" class="changepassformat" placeholder="Security Question"><br>
<input type="text" id="SecurityAns" name="SecurityAns" class="changepassformat" placeholder="Enter the Answer">
整個html代碼
<body background="../Images/zebra_background.jpg">
<div id="header">
<span style="float: left">ZMC Server </span> <img
src="../Images/zebra_logo.png" width=150px height=50px
style="float: right; padding-top: 5px">
<form id="form_logout">
<input type="image" class="logbuttonformat" id="logoutbtn"
src="../Images/logout_deselected.png" onclick="changeLogoutImage()"
alt="submit" style="padding: auto">
</form>
</div>
<form id="form_forgotpswd" >
<p class="slectedNameformat"> FORGOT PASSWORD </p>
<input type="text" id="ForgotPassUname" name="user_name" class="changepassformat"placeholder="Enter Username">
<button class="buttonformat" id="btnuserName" name="btnuserName">SEND</button><br>
<input type="text" id="txt_securityQuestion" name="txt_securityQuestion" class="changepassformat">
<br>
<input type="text" id="SecurityAns" name="SecurityAns"class="changepassformat" placeholder="Enter the Answer">
<br><input type="button" class="buttonformat" value="SUBMIT">
</form>
</body>
</html>
您需要 id 選擇器而不是類選擇器,因為txt_securityQuestion
是元素的 id 而不是它的類:
$("#txt_securityQuestion").val(securityQuestion);
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