:submit Selector
submit selector
version added: 1.0jQuery(':submit')
描述： 选择所有类型为提交的元素。
:submit选择通常适用于按钮或输入元素。请注意，一些浏览器将<button>元素作为type="default"默认处理，而其他浏览器（如Internet Explorer）不是。
Example:
Finds all submit elements that are descendants of a td element.
<!DOCTYPE html>
<html>
<head>
<style>
textarea { height:45px; }
</style>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
</head>
<body>
<table>
<form>
<table id="exampleTable" border="1" cellpadding="10" align="center">
<tr>
<th>
Element Type
</th>
<th>
Element
</th>
</tr
<tr>
<td>
<input type="button" value="Input Button"/>
</td>
</tr>
<tr>
<td>
<input type="checkbox" />
</td>
</tr>
<tr>
<td>
<input type="file" />
</td>
</tr>
<tr>
<td>
<input type="hidden" />
</td>
</tr>
<tr>
<td>
<input type="image" />
</td>
</tr>
<tr>
<td>
<input type="password" />
</td>
</tr>
<tr>
<td>
<input type="radio" />
</td>
</tr>
<tr>
<td>
<input type="reset" />
</td>
</tr>
<tr>
<td>
<input type="submit" />
</td>
</tr>
<tr>
<td>
<input type="text" />
</td>
</tr>
<tr>
<td>
<select><option>Option</option></select>
</td>
</tr>
<tr>
<td>
<textarea></textarea>
</td>
</tr>
<tr>
<td>
<button>Button</button>
</td>
</tr>
<tr>
<td>
<button type="submit">Button type="submit"</button>
</td>
</tr>
</table>
</form>
<div id="result"></div>
<script>
var submitEl = $("td :submit")
.parent('td')
.css({background:"yellow", border:"3px red solid"})
.end();
$('#result').text('jQuery matched ' + submitEl.length + ' elements.');
// so it won't submit
$("form").submit(function () { return false; });
// Extra JS to make the HTML easier to edit (None of this is relevant to the ':submit' selector
$('#exampleTable').find('td').each(function(i, el) {
var inputEl = $(el).children(),
inputType = inputEl.attr('type') ? ' type="' + inputEl.attr('type') + '"' : '';
$(el).before('<td>' + inputEl[0].nodeName + inputType + '</td>');
})
</script>
</body>
</html>