jsfiddle.net {"error": "Please use POST request"} on a href = ""

Error:

<a href="" id="dfddis" onclick="Alertbox();">Alert</a>
     
function Alertbox()
         {
             alert('The Alert!');
        
         } 
- This will throw  {"error": "Please use POST request"} in jsFiddle.net

Fix:
Jquery tries to navigate to an empty target. A '#' will keep the link target within the same page / document.
Use a '#' in the href.

 <a href="#"  id="dfddis" onclick="Alertbox();">Alert</a>

Reference:
http://jsfiddle.net/XPLr6/3/