function scroll_check() {
	if (mouse_wheel_up() || keyboard_check_pressed(vk_up))
	{
	    global.current_box--;
    
	    if (global.current_box < 1)
	        global.current_box = 1;
	    else  
	        scroll_do();
	}
	else if (mouse_wheel_down() || keyboard_check_pressed(vk_down))
	{
	    global.current_box++;
    
	    if (global.current_box > global.box_count-1)
	        global.current_box = global.box_count-1;
	    else
	        scroll_do();
	}


}