根据输入不同的域名，在点击某个按钮后跳转到不同的网站

<script type=”text/javascript”>
function cDomain () {
switch (document.querySelector (‘#domain’).value) {
case ‘a.com’:
location.href = ‘s.a.com’;
break;
case ‘b.com’:
location.href = ‘s.a.com’;
break;
default:
alert (‘域名无匹配’);
}
}
</script>
<input type=”text” id=”domain”/>
<input type=”button” onclick=”cDomain()” value=”按钮”>