Touch Texture Change Menu (owner only)

list MENU1 = [];
list MENU2 = [];
integer listener;
integer MENU_CHANNEL = 1000;
Dialog(key id, list menu)
{
    llListenRemove(listener);
    listener = llListen(MENU_CHANNEL, "", NULL_KEY, "");
    llDialog(id, "Select one Texture: ", menu, MENU_CHANNEL);
}
default
{
    on_rez(integer num)
    {
        llResetScript();
    }
touch_start(integer num_detected){
        if(llDetectedKey(0) != llGetOwner()) return;
   {
        integer i = 0;
        MENU1 = [];
        MENU2 = [];
        integer c = llGetInventoryNumber(INVENTORY_TEXTURE);
        if (c <= 12)
        {
            for (; i < c; ++i)
                MENU1 += llGetInventoryName(INVENTORY_TEXTURE, i);
        }
        else
        {
            for (; i < 11; ++i)
                MENU1 += llGetInventoryName(INVENTORY_TEXTURE, i);
            if(c > 22)
                c = 22;
            for (; i < c; ++i)
                MENU2 += llGetInventoryName(INVENTORY_TEXTURE, i);
            MENU1 += "►";
            MENU2 += "◄";
        }
        Dialog(llDetectedKey(0), MENU1);
    }
    }
    listen(integer channel, string name, key id, string message)
    {
        if (channel == MENU_CHANNEL)
        {
            llListenRemove(listener);
            if (message == "►")
            {
                Dialog(id, MENU2);
            }
            else if (message == "◄")
            {
                Dialog(id, MENU1);
            }
            else
            {
                // change side here
                llSetTexture(message, ALL_SIDES);
            }
        }
    }
 }