title: checking condition onclick event of a button
body: <p>Is it possible to check if (condition) onclick of an event of a button? Because I need to check two functions which are in separate .js files. Also, both the functions should return true to continue forward.</p>
  
  <pre><code>Example:
  
  &lt;input type="button" name="saveButton" onclick="" value="Save" /&gt;
  
  Two functions are validateSelect() in one .js file and validateSave() in 
  another .js file.
  </code></pre>
  
  <p>validateSave() will only be called if validateSelect() returns true. So can we check onclick event of button?</p>