Как вариант...
<!DOCTYPE html>
<html>
<head>
<script src='http://code.jquery.com/jquery-latest.js'></script>
<!--
<script src="https://code.angularjs.org/1.3.9/angular.min.js"></script>
<script src="https://code.angularjs.org/1.3.9/angular-route.js"></script>
<link rel='stylesheet type=text/css href=tmp.css' />
-->
<style type='text/css'>
</style>
<script type='text/javascript'>
$(function(){
$('#one-inp').focus(function(){
this.value='';
}).blur(function(){
this.value=(this.value=='')? 'Привет': this.value;
});
});
</script>
</head>
<body>
<input type='text' value='Привет' id='one-inp' />
</body>
</html>