var _div = ''
    var _prevdiv = ''
    var _t
    
    function displayTab(t)
        {
            _t = t            
            window.setTimeout(wait,700)
        }  
    
    function wait(){
            if(_t != '' && _div != document.getElementById('d'+_t+'_div'))
                {
                if(_div!='')
                    {
                      _prevdiv = _div
                    }
                _div = document.getElementById('d'+_t+'_div')
                //window.setTimeout(expandDiv,500)
                expandDiv()
                //document.getElementById('d'+_t+'_div').style.display = "block"
                }     
    }  
    
    function expandDiv()
        {
     if (_prevdiv == ""){
        Effect.BlindDown(_div, {duration:.3})
     }
      else{
      new Effect.Parallel(
            [ 
            new Effect.BlindDown(_div, {sync: true}), 
            new Effect.BlindUp(_prevdiv, {sync: true}) 
            ], {duration:.3}
            );
      }  
        

        }