// JavaScript Document
function checkscript(submit) {

		if( confirm('Confirm your e-mail address : '+submit))
		{ return true; }
		else { return false;}
}

<script type="text/javascript">
function hide()
{
  document.getElementById("search_box").style.display='none';
}

function show()
{
  document.getElementById("search_box").style.display='block';
}
</script>