<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<input type="checkbox" id="ck" onClick="xiugai()"/>同意
<input type="button" value="注册" id="btn" disabled="disabled" />
</body>
<script type="text/javascript">
function xiugai()
{
//找到复选框
var ck=document.getElementById("ck");
//找到按钮
var btn=document.getElementById("btn");
//判断复选框的选中状态
if(ck.checked)
{
//移除按钮的不可用属性
btn.removeAttribute("disabled");
}
else
{
//设置不可用属性
btn.setAttribute("disabled","disabled");
}
}
</script>
</html>