$("#phone").blur(function () {
alert('on blur');
});
form code:
<form id="input_form" action="">
...
<td class="text_right">phone: </td>
<td class="text_left">
<input id="phone" class="input" type="text" value="(123) 456-7890" name="phone" style="background-color: yellow" maxlength="15" size="15">
</td>