Keyup in Jquery
<p>I want to write in one field and after that opened by the following.I want thet if i enter the text in one field and after that other field are opening but other field dus not open's. Please help me</p>

<pre><code>&lt;html&gt;
&lt;head&gt;
    &lt;script type="text/javascript" src="jquery.js"&gt;&lt;/script&gt;
&lt;script&gt;

    $(document).ready(function() {
        $('#name').keyup(function() {
            if($('#name' == '')){
                $('#version').attr( 'disabled', 'disabled' );
            }
            else {
                $('#version').removeAttr( 'disabled', 'disabled');  
            }   

        });
    });




&lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;div&gt;
        &lt;form&gt;
        Name: &lt;input type="text" name="name" id="name" /&gt;
        Version: &lt;input type="text" name="version" id="version"/&gt;
        Build: &lt;input type="text" name="build" id="build"/&gt;
        &lt;input type="submit" value="Submit" id="submit"/&gt;&lt;/br&gt;
        &lt;input type="text"&gt;
        &lt;/form&gt;
    &lt;/div&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
