title: jquery - onkeyup - replace input and copy to another input
body: <p>The old inline js code looked like this:</p>
  
  <pre><code>onchange="alias_generator(this,document.forms['category_form'].alias)" onkeyup="alias_generator(this,document.forms['category_form'].alias)"
  </code></pre>
  
  <p>This just means: <strong>copy from the 1. input (title)</strong> (this) ... <strong>filter it</strong> with the alias_generator (that removes special character) and <strong>move it to the 2. input (alias)</strong>.</p>
  
  <p>i'am new to jquery and external js - would be great if someone can help me with that.</p>
  
  <p>allready did some that works onload, but does not update...</p>
  
  <pre><code>var title = document.forms['admin'].title;
  
  var alias = document.forms['admin'].alias;
  
  alias_generator(title,alias);
  </code></pre>