Try this:
<style id="switch">
body{
background-color: gray;
}
</style>
<script>
$(document).ready(function(){
$('.button').click(function(){
document.getElementById("switch").disabled=true;
});
});
</script>
<html>
<body>
<a href="#" class="button"><button>Button</button></a>
</body>
</html>
Setting an id to the style tag will control specific css. You can re-enable it by changing disabled back to false. Hope that works.