<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN">
<html> <head>
</head>
<body>
<input type="text"><input type="button" value="search" style="display: none;">
<script type="text/javascript" src="http://code.jquery.com/jquery-1.10.2.min.js"></script>
<script type="text/javascript">
var but = $(':button');
$(':text').focus(function()
{
$(but).css('display', 'block');
}).blur(function()
{
$(but).css('display', 'none');
})
</script>
</body>
</html>