var $element = $('body:not(.drupalorg-site-main.front) #edit-search-theme-form-1'),
value = $element.siblings('label').text();
<div class="form-item" id="edit-search-theme-form-1-wrapper">
<label for="edit-search-theme-form-1">Search Inkebook.com </label>
<input type="text" maxlength="128" name="keys" id="edit-search-theme-form-1" size="15" value="" title="Enter the terms you wish to search for." class="form-text">
</div>value为什么没取到值,
我是用firebug , 在这个页面(http://www.inkebook.com/)执行一下代码提示:TypeError: element is null
[在此错误处中断] value = element.siblings('label').text();
<head>
<title>在线投票系统</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
</head>
<body>
<div class="form-item" id="edit-search-theme-form-1-wrapper">
<label for="edit-search-theme-form-1">Search Inkebook.com </label>
<input type="text" maxlength="128" name="keys" id="edit-search-theme-form-1" size="15" value="" title="Enter the terms you wish to search for." class="form-text">
</div>
<script> var $element = $('body:not(.drupalorg-site-main.front) #edit-search-theme-form-1'),
value = $element.siblings('label').text();
alert(value);
</script>
</body>
</html>可以取到啊
var $element是什么意思
这是什么东西。。
楼主用这句话试试呢?
<html>
<head>
<title> 标题 </title>
<meta charset="utf-8"/>
<script src="jquery.js"></script>
</head>
<body>
<div class="form-item" id="edit-search-theme-form-1-wrapper">
<label for="edit-search-theme-form-1">Search Inkebook.com </label>
<input type="text" maxlength="128" name="keys" id="edit-search-theme-form-1" size="15" value="" title="Enter the terms you wish to search for." class="form-text">
</div>
<script>
var $element = $('body:not(.drupalorg-site-main.front) #edit-search-theme-form-1'),
value = $element.siblings('label').text();
alert(value); </script>
</body>
</html>没有任何问题
把脚本放在dom的后面,或者写在window.onload 或 dom.ready里<!DOCTYPE HTML>
<html>
<head>
<meta charset="gb2312" />
<title></title>
<script src="http://code.jquery.com/jquery-latest.js"></script>
<style>
</style>
</head>
<body>
<div class="form-item" id="edit-search-theme-form-1-wrapper">
<label for="edit-search-theme-form-1">Search Inkebook.com </label>
<input type="text" maxlength="128" name="keys" id="edit-search-theme-form-1" size="15" value="" title="Enter the terms you wish to search for." class="form-text">
</div>
<script>
var $element = $('body:not(.drupalorg-site-main.front) #edit-search-theme-form-1'),
value = $element.siblings('label').text();
alert(value)
</script>
</body>
</html>