復制代碼 代碼如下:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>jquery test</title>
<script src="jquery-1.11.1.min.js"></script>
</head>
<body>
<input type="checkbox" value="one"/>one<br/>
<input type="checkbox" value="two"/>two<br/>
<input type="checkbox" value="three"/>three<br/>
<input type="checkbox" value="four"/>four<br/>
<input type="checkbox" value="five"/>five<br/>
<input type="checkbox" value="six"/>six<br/>
<input type="checkbox" value="seven"/>seven<br/>
<button>提交</button>
<script type="text/javascript">
$("button[name=sub]").click(function(){
var len = $("input:checkbox:checked").length;
alert("你一共選中了"+len+"個復選框");
})
</script>
</body>
</html>
復制代碼 代碼如下:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>jquery test</title>
<script src="jquery-1.11.1.min.js"></script>
</head>
<body>
<input type="checkbox" value="one"/>one<br/>
<input type="checkbox" value="two"/>two<br/>
<input type="checkbox" value="three"/>three<br/>
<input type="checkbox" value="four"/>four<br/>
<input type="checkbox" value="five"/>five<br/>
<input type="checkbox" value="six"/>six<br/>
<input type="checkbox" value="seven"/>seven<br/>
<script type="text/javascript">
$("input:checkbox").click(function(){
var len = $("input:checkbox:checked").length;
if(len>3){
alert('親，最多只能選三個喲~');
return false; //另剛才勾選的取消
}
})
</script>
</body>
</html>
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