您可以使用 JavaScript。您想在点击提交时还是在您做出选择后才这样做?
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<script type="text/javascript">
function changeClass(){
var myVariable = document.getElementById('control').value;
if(myVariable == "drinks"){
document.getElementById('drinks').className = "";
document.getElementById('breakfast').className = "hide";
}
else if(myVariable == "breakfast"){
document.getElementById('drinks').className = "hide";
document.getElementById('breakfast').className = "";
}
}
</script>
<div id="select">
<form>Menu:
<select name="select" class="form-control" id="control" onChange="changeClass()">
<option value="drinks">Drinks</option>
<option value="breakfast">Breakfast</option>
</select>
</form>
</div>
<div id="drinks">
<h2 align="center">Drinks</h2>
<table width="888" border="" cellpadding="9" class="">..</table>
</div>
<!--Breakfast table-->
<div id="breakfast" class="hide">
<h2 align="center">Breakfast</h2>
<table width="888" border="" cellpadding="9" class="">..</table>
</div>