code: function(e, params) {
        var value = params[0];
        var f = this.nameIndex[value];
        var lastInput = this.inputs[this.inputs.length-1];
        var next = this.divEl.childNodes[inputEx.indexOf(lastInput.getEl(), this.divEl.childNodes)+1];
        lastInput.destroy();
        this.inputs.pop();
        var field = this.renderField(f);
        var fieldEl = field.getEl();
     	YAHOO.util.Dom.setStyle(fieldEl, 'float', 'left');
  	   
     	this.divEl.insertBefore(fieldEl, next);
     }
docs: Rebuild the value field