detect Input text field not empty >> make div disappear

Question

I have a text input field and a div that contains an image. I would like the image to disappear once a person starts typing in the input field.

<div id="writehere">
<input type="text" id="myinput">
</div>

<div id="container"> 
<div id="introimg"><img src=.../intro.png"/></div>
</div>

Answer 1

try this code.

$(document).ready(function () {
  $("#myinput").keypress(function () {
            $("#container").hide();
        });
});

But how do you want to show the pic again?