So I have a strange problem. I have this community site where members can send messages to each other, but now when you go to your inbox using Firefox, your messages are not displayed and trying to go from Inbox to Sent or Trash doesn't work. Everything works in IE and Safari, but not in Firefox..

This is the code for the menu on the messages page;

<span id="inboxButton" style="background:#dedede; border-right:1px solid #999999; border-left:1px solid #999999; border-top:1px solid #999999; cursorointer; padding:3px; margin-left:10px; font-weight:bold;" onClick="showInbox(1);">inbox</span>

<span id="sentButton" style="background:#b9c3ca; border-top:1px solid #999999; border-left:1px solid #999999; border-right:1px solid #999999; cursorointer; padding:3px; margin:1px; font-weight:bold;" onClick="showSent(1);">skickat</span>

<span id="deletedButton" style="background:#b9c3ca; border-top:1px solid #999999; border-left:1px solid #999999; border-right:1px solid #999999; cursorointer; padding:3px; margin:1px; font-weight:bold;" onClick="showDeleted(1);">papperskorgen</span>

Any help is appreciated, thanks in advance.