title: Onclick SyntaxError: identifier starts immediately after numeric literal
body: <p>I have an onclick function:<br/></p>
  
  <pre><code>onclick='deleteRow(".$bon['Werkbonnummer'].");updateVak(".$bon['Stellingvak'].");)'`&lt;br/&gt;
  &lt;br/&gt;
  Implemented in:&lt;br/&gt;
  echo "&lt;td&gt;&lt;button class='delete' onclick='deleteRow(".$bon['Werkbonnummer'].");updateVak(".$bon['Stellingvak'].");)'&gt;Klaar&lt;/button&gt;&lt;/td&gt;&lt;/tr&gt;";`&lt;br/&gt;
  </code></pre>
  
  <p>When I push the button, FireBug gives me this error:<br/></p>
  
  <pre><code>SyntaxError: identifier starts immediately after numeric literal
  deleteRow(71);updateVak(4D);)`&lt;br/&gt;
  `-----------------------^
  
  &lt;br/&gt;&lt;br/&gt;
  </code></pre>
  
  <p>Can somebody point out what I did wrong?</p>