title: onkeyup not working
body: <p>my expected output is </p>
  
  <p>As i type on input text field i get instant sum on third text field</p>
  
  <p>if i type 3 on first text field and key is up , instantly 3+0=3 have to show on  third field</p>
  
  <p>but doesnt show any result </p>
  
  <pre><code>     $(document).ready(function(){
          var a=0, b=0,c=0;
  
          $("input:#a").keyup(function(){
              a=$("input:#a").val();
              c=a+b;
              $("input:#c").append(a+"+"+"b"+"="+c);
           });
  
          $("input:#a").keyup(function(){
              b=$("input:#b").val();
              c=a+b;
              $("input:#c").append(a+"+"+b+"="+c);
          });
  
       });
  
  
  
          &lt;tr&gt;&lt;td&gt;&lt;input type="text" id="a"&gt;&lt;/td&gt;&lt;/tr&gt;
          &lt;tr&gt;&lt;td&gt;&lt;input type="text" id="b"&gt;&lt;/td&gt;&lt;/tr&gt;
          &lt;tr&gt;&lt;td&gt;&lt;input type="text" id="c"&gt;&lt;/td&gt;&lt;/tr&gt;
  </code></pre>