目标：
当您按下特定按钮例如按钮id =＆＃34; button_a＆＃34;时，您应该从id =＆＃34; a1＆＃34;中检索该值。然后它应显示为警报消息。
问题：
当您有一个介于100到200行之间的表时，您无法在javascript中对特定的ID名称进行硬编码。
问题：
你应该如何检索例如id =＆＃34; a1＆＃34;的值。当你按下按钮？
我已经尝试并了解到你使用了＃34; previousSibling＆＃34; （http://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_node_previoussibling）但它比我预期的更复杂。
<table>
<tr>
<td><div id="a1"><div id="aa1">aa1</div></div></td>
<td><div id="a2"><div id="aa2">aa2</div></div></td>
<td><button id="button_a"></button></td>
<td></td>
</tr>
<tr>
<td><div id="b1"><div id="bb1">bb1</div></div></td>
<td><div id="b2"><div id="bb2">bb2</div></div></td>
<td><button id="button_b"></button></td>
<td></td>
</tr>
<tr>
<td><div id="c1"><div id="cc1">cc1</div></div></td>
<td><div id="c2"><div id="cc2">cc2</div></div></td>
<td><button id="button_c"></button></td>
<td></td>
</tr>
<tr>
<td><div id="d1"><div id="dd1">dd1</div></div></td>
<td><div id="d2"><div id="dd2">dd2</div></div></td>
<td><button id="button_d"></button></td>
<td></td>
</tr>
</table>
答案 0 :(得分：2)
如果我理解正确，您需要点击按钮时var push = PushNotification.init({ "android": {"senderID": "12345679"},
"ios": {"alert": "true", "badge": "true", "sound": "true"}, "windows": {} } );
内<!DOCTYPE HTML>
<html lang = "en">
<head>
<link rel="stylesheet" type="text/css" href="mystylesheet.css">
<title>Tech Order Department.html</title>
<meta charset = "UTF-8" />
</head>
<body>
<!--Designing my form-->
<h2>New Projects</h2>
<br>
<?php
if($_POST['formSubmit'] == "Submit")
{
$varMovie = $_POST['formProject'];
$varMovie = $_POST['formClient'];
$varMovie = $_POST['formLastName'];
$varMovie = $_POST['formDateReceived'];
}
?>
<form action="myform.php" method="post">
Project:<br>
<input type="text" name="Project">
<br>
Client:<br>
<input type="text" name="Client">
<br>
Last Name:<br>
<input type="text" name="LastName">
<br>
Date Received:<br>
<input type="text" name="DateReceived">
<br><br>
<input type="submit" name="formSubmit" value="Submit">
</form>
<?php
if($_POST['formSubmit'] == "Submit")
{
$errorMessage = "";
if(empty($_POST['formProject']))
{
$errorMessage .= "<li>You forgot to enter a project name!</li>";
}
if(empty($_POST['formClient']))
{
$errorMessage .= "<li>You forgot to enter a client name!</li>";
}
if(empty($_POST['formLastName']))
{
$errorMessage .= "<li>You forgot to enter the tech writer name!</li>";
}
if(empty($_POST['formDateReceived']))
{
$errorMessage .= "<li>You forgot to enter the date received!</li>";
}
$varMovie = $_POST['formProject'];
$varName = $_POST['formClient'];
$varMovie = $_POST['formLastName'];
$varMovie = $_POST['formDateReceived'];
if(!empty($errorMessage))
{
echo("<p>There was an error with your form:</p>\n");
echo("<ul>" . $errorMessage . "</ul>\n");
}
}
?>
</body>
</html>
的值。您可以使用：
divtr
<强>参考
答案 1 :(得分：1)
使用jQuery，您可以轻松地按树导航。您可以做到以下几点：
$('#button_a').on('click', function(e) {
var div_a1 = $(this).closest('tr').find('div').first();
// and so on
}