如何仅使用jQuery选择可见元素？
jQuery选择器：可见和：隐藏只尊重显示：没有真的隐藏？不可见度：隐藏或可见度：可见。
我明白他们在技术上不是隐藏的because they still take their space.我只想知道他们的状态，所以我可以检查可见的复选框。
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>jQuery :visiblity Selector Test</title>
<script src="http://code.jquery.com/jquery-latest.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function() {
$("#VisibleCount").text($("input[type=checkBox]:visible").length); //returns 3. I think it should be 2
$("#HiddenCount").text($("input[type=checkBox]:hidden").length); //returns 1. I think it should be 2
});
</script>
<style type="text/css">
#TestArea
{
border: solid red 1px;
}
#Results
{
background-color: Lime;
}
.container
{
border: solid black 1px;
}
</style>
</head>
<body>
<div id="TestArea">
<div class="container">
visibility: hidden;<div style="visibility: hidden;">
<input id="CheckBox1" type="checkBox" />
</div>
</div>
<div class="container">
visibility: visible;<div style="visibility: visible;">
<input id="CheckBox2" type="checkBox" />
</div>
</div>
<div class="container">
display: none;<div style="display: none;">
<input id="CheckBox3" type="checkBox" />
</div>
</div>
<div class="container">
display: inline;<div style="display: inline;">
<input id="CheckBox4" type="checkBox" />
</div>
</div>
</div>
<div id="Results">
<div>
Visible Count: <span id="VisibleCount"></span>
</div>
<div>
Hidden Count: <span id="HiddenCount"></span>
</div>
</div>
</body>
</html>
