Jquery没有选择a标签，虽然我在Jquery代码中选择了它，但是没有阻止标签默认动作。我只复制了代码的相关部分，所以人们可以告诉我出了什么问题。
我选择其他链接的Jquery代码的其他部分工作...并且阻止了默认操作..下面是问题部分。
<?php
header ("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header ("Expires: Sat 26 Jul 1997 05:00:00 GMT"); // Date in the past
require_once ("../_includes/functions.php");
?>
<link rel="stylesheet" title="Style CSS" href="../_reports/report_assets/cwcalendar.css" type="text/css" media="all" />
<script src="../_js/jquery-1.6.2.min.js" type="text/javascript" charset="utf-8"></script>
<script src="../_js/timer.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript" src="../_reports/report_assets/calendar.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$('#select').click(function(event){
$(':checkbox').prop("checked", true);
event.preventDefault();
});
$('#deselect').click(function(event){
$(':checkbox').prop("checked", false);
event.preventDefault();
});
$('#add').click(function() {
var field = '<input class="project_fields" type="text" size ="30" name = field_settings[] /> ';
var checkbox = '<input class ="checkbox" type ="checkbox" name ="check_field[]" /> ';
var delete_link = '<a class ="delete_link" style="text-decoration:none;" href="#"> Delete field </a> <br /><br />';
var input = field + checkbox + delete_link;
$('#input_fields').append(input);
});
$('div#input_fields a.delete_link').click(function(event) {
event.preventDefault();
alert('clicked !!!!');
});
$('#project_fields_submit').click(function() {
var array_fields = new Array();
$('.checkbox').each(function() {
if($(this) .is(':checked')) {
array_fields.push('1');
}
else {
array_fields.push('0');
}
});
$('#checkboxes').val(array_fields);
});
$('#edit_fields_submit').click(function() {
var edit_fields = new Array();
$('.edit_check').each(function() {
if($(this) .is(':checked')) {
edit_fields.push('1');
}
else {
edit_fields.push('0');
}
});
$('#edit_checkboxes').val(edit_fields);
});
$('#add_edit').click(function() {
var new_field = '<input class ="edit_data" type="text" size ="40" name = edit_field_value[] value =""> ';
var new_checkbox = '<input class ="edit_check" type ="checkbox" name ="check_field[]" > ';
var delete_edit = '<a id ="new_delete_edit" style="text-decoration:none;" href="#" > Delete field </a><br><br>';
var new_input = new_field + new_checkbox;
$('#new_input_fields').append(new_input);
$('#new_input_fields').append(delete_edit);
});
$('a.delete_edit').click(function(event) {
event.preventDefault();
var ID = $(this).attr('id');
var delete_field_id = 'edit_field'+ID;
var field_data = $('#'+ delete_field_id).val();
var project_id = $('#edit_project_id').val();
var string = {field : field_data, pid : project_id };
$.ajax({
type: "POST",
url: "_ajax/delete_field.php",
data: string,
success: function(data){
$('#'+ID).remove();
$('#'+delete_field_id).remove();
$('#new_check'+ID).remove();
}
});
});
$('#new_delete_edit').click(function(event) {
alert("clicked !!!");
event.preventDefault();
alert("Was preventDefault() called: " + event.isDefaultPrevented());
$(this).hide();
});
});
</script>
<?php
function GetClientDropdown($pid){
$data = "";
$query = "SELECT cms_users.username, managers.user_id, managers.project_id, cms_users.status
FROM cms_users
INNER JOIN managers
ON cms_users.user_id=managers.user_id AND managers.project_id='$pid' AND status!=1
ORDER BY managers.user_id ASC";
$result = mysql_query($query);
$data .= '<form action="" method="POST" accept-charset="utf-8" onsubmit="SubmitClientSettings(event);">
<select id="client_managers" onChange="GetClientInfo(this);">
<option value="0">Select User';
while ($row = mysql_fetch_assoc($result)){
$data .= '<option value="' . $row['user_id'] . '">' . $row['username'];
}
$data .= '</select>';
$data .= '<div id="manager_info"></div>';
$data .= '</form>';
return $data;
}
function GetStartDate($sid){
$query = "SELECT start_date FROM shows WHERE show_id='$sid'";
$result = mysql_fetch_assoc(mysql_query($query));
return $result['start_date'];
}
function GetEndDate($sid){
$query = "SELECT end_date FROM shows WHERE show_id='$sid'";
$result = mysql_fetch_assoc(mysql_query($query));
return $result['end_date'];
}
if (isset($_GET['pid']) && isset($_GET['user_id'])) {
$id = $_GET['user_id'];
$pid = $_GET['pid'];
$show_id = $_GET['show_id'];
$query = "SELECT status FROM cms_users WHERE user_id='$id' LIMIT 1";
$result = mysql_fetch_assoc(mysql_query($query));
$status = $result['status'];
$start = GetStartDate($show_id);
$end = GetEndDate($show_id);
$pieces = explode ("-", $start);
$year = $pieces [0];
$month = $pieces[1];
$day = $pieces[2];
$day = $day + 0;
$start = $year."-".$month."-".$day;
$pieces = explode ("-", $end);
$year = $pieces [0];
$month = $pieces[1];
$day = $pieces[2];
$day = $day + 0;
$end = $year."-".$month."-".$day;
$query = "SELECT send_method FROM show_settings WHERE show_id='$show_id' LIMIT 1";
$row = mysql_fetch_assoc(mysql_query($query));
$auto = $manual = "";
if ($row['send_method']){
$auto = "checked";
}else{
$manual = "checked";
}
?>
<?php echo '<!-- tab 1 --><div id="fragment-6" class="removable">';
echo '<div id ="project_settings" style="display:none;">';
echo '<div class="FormArea" style="min-height:600px;">';
$query_settings ="SELECT project_settings FROM projects WHERE project_id ='$pid'";
$result_settings = mysql_query($query_settings);
$row_settings = mysql_fetch_array($result_settings,MYSQL_ASSOC);
if($row_settings['project_settings'] == NULL) {
echo "<h2> Project Settings </h2>";
echo "<br><br>";
echo " <b> Add fields </b>";
echo " ";
echo "<img id ='add' src='_assets/add.png' /><br><br><br>";
echo '<form action ="" method="post">';
echo'<input type="hidden" name="pid" value="'.$pid.'">';
echo "<input id ='checkboxes' type ='hidden' name ='checkboxes' value ='' >";
echo "<div id='input_fields'> </div>";
echo '<input id ="project_fields_submit" type ="submit" name ="project_fields_submit" class="button" value ="Save Settings" /><br><br>';
echo '</form>';
echo "<br><br><br><br><p></p>";
}
else {
echo "<h2> This Project Settings </h2>";
echo "<br><br><br><br>";
echo "<b> Add fields</b> <img id ='add_edit' src='_assets/add.png' /><br><br><br>";
$fields_data = unserialize($row_settings['project_settings']);
$i = 0;
echo '<form action ="" method="post">';
echo'<input id ="edit_project_id" type="hidden" name="edit_project_id" value="'.$pid.'">';
echo "<div id='new_input_fields'> </div>";
echo "<input id ='edit_checkboxes' type ='hidden' name ='edit_checkbox' value ='' >";
foreach ($fields_data as $key => $value) {
if($value =="1") {
echo "<input id ='edit_field".$i."' class ='edit_data' type ='text' size ='40' name = edit_field_value[] value ='".$key."' /> ";
echo "<input id ='new_check".$i."' class ='edit_check' type='checkbox' name ='edit_checkboxes' checked /> ";
echo "<a id ='".$i."' class ='delete_edit' style='text-decoration:none;' href='#'> Delete field </a><br><br>";
} else {
echo "<input id ='edit_field".$i."' class ='edit_data' type ='text' size='40' name = edit_field_value[] value ='".$key."' /> ";
echo "<input id ='new_check".$i."' class ='edit_check' type='checkbox' name ='edit_checkboxes' /> ";
echo "<a id ='".$i."' class ='delete_edit' style='text-decoration:none;' href='#'> Delete field </a><br><br>";
}
$i++;
}
echo '<input id ="edit_fields_submit" type ="submit" name ="edit_fields_submit" class="button" value ="Save Settings" /><br><br>';
echo '</form>';
}
echo '</div>';
echo '<div id="project-setting-results"></div><div class="clear"></div>';
echo '</div><!-- end fragment-6 -->';
}
?>
答案 0 :(得分：2)
您正在尝试在创建元素之前绑定选择器。您正在寻找的是.live()，它将侦听器附加到父元素，并在触发选择器的对象上查找事件。我看到你使用的是jQuery 1.6.2，所以你也可以看一下delegate。如果您使用委托，您的代码可能如下所示（您将需要切换回类选择器以干净地支持多个元素）：
$("#add_edit").delegate("a.new_delete_edit", "click", function(event) {
alert("clicked !!!");
event.preventDefault();
alert("Was preventDefault() called: " + event.isDefaultPrevented());
$(this).hide();
});
如果这完全有效，那么很难跟上代码的形式，但想法是将监听器附加到"#add_edit"然后添加新的a.new_delete_edit，如果在一个它们会冒泡到这个代码将被触发的侦听器。
答案 1 :(得分：0)
正如我在代码中看到的那样，
动态添加带有a类的 new_delete_edit。
您正在使用click（较旧的jQuery版本）而不是on（较新的jQuery版本）。 click不支持动态添加的元素。
您需要jQuery live插件或对on事件使用click更新的jquery，因为它支持动态添加的DOM元素。