<html>
<head>
<script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("input").focus(function(){
$("span").css("display","inline").fadeOut(2000);
});
});
</script>
<style>
span
{
display:none;
}
</style>
</head>
<body>
<input>
<span>Can I have you phone number?</span>
<p>Click in the input field to get focus.</p>
</body>
</html>