start: function(how, mode){
      if (!this.check(how, mode)) return this;
      this[mode || this.options.mode]();

      var margin = this.element.getStyle(this.margin).toInt(),
         layout = this.wrapper.getStyle(this.layout).toInt(),
         caseIn = [[margin, layout], [0, this.offset]],
         caseOut = [[margin, layout], [-this.offset, 0]],
         start;

      switch (how){
         case 'in': start = caseIn; break;
         case 'out': start = caseOut; break;
         case 'toggle': start = (layout == 0) ? caseIn : caseOut;
      }
      return this.parent(start[0], start[1]);
   },

   slideIn: function(mode){
      return this.start('in', mode);
   },

   slideOut: function(mode){
      return this.start('out', mode);
   },

   hide: function(mode){
      this[mode || this.options.mode]();
      this.open = false;
      return this.set([-this.offset, 0]);
   },

   show: function(mode){
      this[mode || this.options.mode]();
      this.open = true;
      return this.set([0, this.offset]);
   },

   toggle: function(mode){
      return this.start('toggle', mode);
   }