Window H/Centered in FF & JeasyUI 1.3.1

[mapner]

Hello:

jQuery EasyUI 1.3.1 with Mozilla FireFox 15.9 or 16.0 this windows dont show centered horizontally, in Chrome or IE 8 work fine.
With jQuery EasyUI 1.3.0 work fine in FF.

Code:

<div id="#fm_login" class="easyui-window" title="Login" iconCls="icon-login"  collapsible="false" minimizable="false" maximizable="false" closable="false" style="width:350px;height:auto;padding:5px;background:#D8D8D8">
  <form id="fm_login" method="POST"  ACTION="Sys_users/Login">      
    <br>
    <div class="fitem">  
      <label>Usuario:</label>  
      <input name="q_usr_id" >  
    </div>          
    <div class="fitem">  
      <label>Clave:</label>  
      <input name="q_usr_key" TYPE=PASSWORD>  
    </div>          
    <div id="dlg-buttons"  align="center">  
      <br>	  
      <a href="#" class="easyui-linkbutton" iconCls="icon-ok" style="text-align:center;" onclick="loginSubmit()">Ingresar</a>        
    </div>     
  </form>
</div>  
</body> 

[mapner]

Sorry, I say centered vertically.