Hide the Submit Button on Single Click

<script type="text/javascript">
function hideButton()
//Hides submit button to avoid multiclicking
{
document.getElementById("submit").style.visibility = "hidden";
document.getElementById("submit").disabled = "disabled";
document.getElementById("submitalt").style.visibility = "visible";
}
</script>

<strong>
<div id="submitalt" style="visibility:hidden; position:absolute; top:100px; left:400px;">Message text...</div>
</strong>
<input class="button" type="submit" name="submit" value="Submit">