If the space on that page is not disabled then put your button inside a div.
<div id="a1">
<button>Click here</button>
</div>
Using Jquery:
<script language="javascript">
$("#a1").hide();
</script>
Using JS:
<script language="javascript">
document.getElementById("a1").style.visibility = "hidden";
document.getElementById("a1").style.display = "none";
</script>