实现全选、反选
<body>
<form method="post" action="">
您精通的语言:<input type="checkbox" id="checkedAllBox" />全选/全不选
<br />
<input type="checkbox" name="items" value="jav" />java
<input type="checkbox" name="items" value="js" />javascript
<input type="checkbox" name="items" value="c++" />c++
<input type="checkbox" name="items" value="python" />python
<br />
<input type="button" id="checkedAllBtn" value="全 选" />
<input type="button" id="checkedNoBtn" value="全不选" />
<input type="button" id="checkedRevBtn" value="反 选" />
<input type="button" id="sendBtn" value="提 交" />
</form>
<script type="text/javascript" src="要导入的jqury类库的路径"></script>
<script type="text/javascript">
$(function(){
var $items = $(":checkbox[name=items]");
var items = $("[name='items']");
$("#checkedAllBtn").click(function(){
items.attr("checked",true);
$("#checkedAllBox").attr("checked",true);
});
$("#checkedNoBtn").click(function(){
items.attr("checked",false);
$("#checkedAllBox").attr("checked",false);
});
$("#checkedRevBtn").click(function(){
items.each(function(){
this.checked = !this.checked;
});
var flag = $("[name='items']:checked").length==4;
$("#checkedAllBox").attr("checked",flag);
});
$("#sendBtn").click(function(){
$(":checkbox[name='items']:checked").each(function()
alert(this.value);
});
});
$("#checkedAllBox").click(function(){
items.attr("checked",this.checked);
});
$("[name='items']").click(function(){
var flag = $("[name='items']:checked").length==4;
$("#checkedAllBox").attr("checked",flag);
});
});
</script>
</body>