Sorttable making multiples eventListeners

[dfprado63]

Hi, Stuart Langridge!
First, thanks for sorttable! It's amazing sort script I've found!

Now, in some of my tables I get multiple eventListeners. This issue make my tables to sort only in a one way. So, I change a little the dean_addEvent(...) to "fix" my issue.

This was my change:

function dean_addEvent(element,type,handler) {
   if(element.getAttribute("event")!="true") {
       if() {
           ...
        } else {
           ...
        }
        element.setAttribute("event","true");
   }
}

Hope this can help others. Kind regards.