Remove column headers in dynamic grid

[sencha.user]

Hi,

I am using dynamic grid and model plugin,
http://www.sencha.com/forum/showthre...-dynamic-model

I will send in query dynamically to php file and it forms grid, but when there is no data, it still has column header like,
zzb4zY.jpg

How do I remove column header? I want empty grid when there is no data.

Thanks!

[sencha.user]

Some more info,

I have dynamic grid in the panel like,

{
      xtype: 'dynamicGrid',
      url: 'php/update.php',
      viewConfig: {
            autoRender: true
            }
}

If I am not sending parameter to PHP, I shouldn't get column header. Currently I have it like,

if (arrayValues == '')
            {
                alert("Select a column name");
            }
            else
            {
            var dynamicGrid = Ext.ComponentQuery.query('dynamicGrid')[0];
            dynamicGrid.getStore().load({
            params:{
                param1: [arrayValues]
            }
        });
}

I want to do something in that alert portion to clear column header, since I don't define store for this grid, I don't know how to do.

[sencha.user]

Anyone?