title: Allow only white space, letters, backspace, and tab
body: <p>I'm using Firefox to test my script out. My goal is to allow white space, letters, backspace and tab to work, but for some reason I could break my code and type in a number which I don't want. How can I fix this issue? </p>
  
  <p>This is what I have so far:</p>
  
  <pre><code>                $(document).ready(function () {
                      $("#inputTextBox").keypress(function (event) {
                          var inputValue = event.which;
  
                          //Backspace ASCII = 8 
                          //Tab ASCII = 9 
                          if (!(inputValue &gt;= 65 &amp;&amp; inputValue &lt;= 123)) {
                              if (inputValue === 8 &amp;&amp; inputValue === 9){
                                  event.preventDefault();
                              }
                          }
                          console.log(inputValue);
                      });
  </code></pre>