我在这里转了一圈，什么也没找到，所以我会在这里问一下。如何检查是否在 <select> 中选择了某个选项盒子？
这是我到目前为止没有用的:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="imagetoolbar" content="no" />
<title>FancyBox 1.3.4 | Demonstration</title>
<script type="text/javascript" src="jquery-1.5.1.min.js"></script>
<script type="text/javascript" src="scripts/fancybox/jquery.mousewheel-3.0.4.pack.js"></script>
<script type="text/javascript" src="scripts/fancybox/jquery.fancybox-1.3.4.pack.js"></script>
<link rel="stylesheet" type="text/css" href="scripts/fancybox/jquery.fancybox-1.3.4.css" media="screen" />
<link rel="stylesheet" href="style.css" />
<script type="text/javascript">
$(document).ready(function() {
$("#various1").fancybox({
'transitionIn' : 'fade',
'transitionOut' : 'fade',
'speedIn' : 300,
'height': '300',
'width': '300',
'speedOut' : 300,
'opacity' : true,
'centerOnScroll': true,
'autoDimensions': false
});
});
</script>
<style>
* {
margin: 0;
padding: 0;
}
.header {
background:#789FCC;
color:#fff;
font:16px verdana;
font-weight:700;
padding:5px;
margin-bottom:10px;
}
h3 {
font-weight: bold;
font-size: 17px;
display: block;
padding:5px;
}
#inline1 {
padding:0;
margin:0;
font:12px verdana;
}
#note {
display:none;
}
</style>
<script type="text/javascript">
$(document).ready(function() {
if ($("#test_now option[value='3']:selected")) {
alert('Testing');
$("#note").toggle();
}
</script>
</head>
<body>
<a id="various1" href="#inline1">Report Answer</a>
<div style="margin:0;padding:0;display:none;">
<div id="inline1" style="padding:0;marging-top:10px;">
<div class="header"><h3>Testing</h3></div>
Submit this form:
<form method="post" action="x.html">
<select id="test_now" name="why">
<option value="1">One</option>
<option value="2">Two</option>
<option value="3">Three</option>
<option value="4">Four</option>
<option value="5">Five</option>
</select>
<br />
<div id="note"><textarea rows="5" cols="20"></textarea></div>
</form>
</div>
</div>
</body>
</html>
最佳答案
var selectedValue = $('#test_now').val();
if (selectedValue == '3') {
// The option 3 is selected
}
但是因为您将此测试直接放在 document ready 中，所以可能会预选第一个选项，除非您显式修改标记以预选特定选项:
<select id="test_now" name="why">
<option value="1">One</option>
<option value="2">Two</option>
<option value="3" selected="selected">Three</option>
<option value="4">Four</option>
<option value="5">Five</option>
</select>
关于jquery - 如何检查是否在 jQuery 中选中了某个选择选项，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5442925/