if (document.images)
{
    pic_filter_on	 	        = new Image(70,22);
    pic_filter_on.src 	        = "gfx/btn_filter_h.gif";
    pic_filter_off	 	        = new Image(70,22);
    pic_filter_off.src	        = "gfx/btn_filter.gif";

    pic_filter_y_on	 	        = new Image(70,22);
    pic_filter_y_on.src         = "gfx/btn_filter_y_h.gif";
    pic_filter_y_off	        = new Image(70,22);
    pic_filter_y_off.src        = "gfx/btn_filter_y.gif";

    pic_filter_inv_on	        = new Image(70,22);
    pic_filter_inv_on.src       = "gfx/btn_filter_inv_h.gif";
    pic_filter_inv_off	        = new Image(70,22);
    pic_filter_inv_off.src      = "gfx/btn_filter_inv.gif";

    pic_filter_y_inv_on	        = new Image(70,22);
    pic_filter_y_inv_on.src     = "gfx/btn_filter_y_inv_h.gif";
    pic_filter_y_inv_off        = new Image(70,22);
    pic_filter_y_inv_off.src    = "gfx/btn_filter_y_inv.gif";

    pic_setting_on	 	        = new Image(83,22);
    pic_setting_on.src 	        = "gfx/btn_setting_h.gif";
    pic_setting_off	 	        = new Image(83,22);
    pic_setting_off.src	        = "gfx/btn_setting.gif";

    pic_setting_inv_on	        = new Image(83,22);
    pic_setting_inv_on.src 	    = "gfx/btn_setting_inv_h.gif";
    pic_setting_inv_off	        = new Image(83,22);
    pic_setting_inv_off.src	    = "gfx/btn_setting_inv.gif";	
}