Check if input field has text, with the value="" attribute set

I have an input field like this (and it must have value=""):

<input type="text" id="title" value="" name="title">

How can I check whether or not the input has any text? I've tried this, but because of the value="", it seems to not correctly evaluate that the input has actual text:

if ($('input').val().length)
{
    // do something
}

Thanks.