title: How to prevent reload with onclick without "#"?
body: <p>I wish to put some instructions with a link - onclick calling a script that display a simple alert box. If I did like this...</p>
  
  <pre><code>&lt;label for="arquivo"&gt;Máximo de 1MB, observe os &lt;a href="" onclick="ajudaUpload();"&gt;tipos permitidos&lt;/a&gt;.&lt;/label&gt;
  </code></pre>
  
  <p>the page is reloaded even with a return false, and if I did like this...</p>
  
  <pre><code>&lt;label for="arquivo"&gt;Máximo de 1MB, observe os &lt;a href="#" onclick="ajudaUpload();"&gt;tipos permitidos&lt;/a&gt;.&lt;/label&gt;
  </code></pre>
  
  <p>with the "#" symbol, the page is scrolled to the top and "#" is added to query string. Is there a third way to do it without reloading, scrolling and garbage?</p>