if (document.images){
 b1_on = new Image(); b1_on.src = "images/buttons/numbers/one_on.gif";
 b1_off = new Image(); b1_off.src = "images/buttons/numbers/one_off.gif";
// b1_flash = new Image(); b1_flash.src = "images/buttons/numbers/one_a.gif";
 b1_red = new Image(); b1_red.src = "images/buttons/numbers/one_red.gif";
 
 b2_on = new Image(); b2_on.src = "images/buttons/numbers/two_on.gif";
 b2_off = new Image(); b2_off.src = "images/buttons/numbers/two_off.gif";
 b2_red = new Image(); b2_red.src = "images/buttons/numbers/two_red.gif";
 b2_flash = new Image(); b2_flash.src = "images/buttons/numbers/two_a.gif";
 
 b3_on = new Image(); b3_on.src = "images/buttons/numbers/three_on.gif";
 b3_off = new Image(); b3_off.src = "images/buttons/numbers/three_off.gif";
 b3_red = new Image(); b3_red.src = "images/buttons/numbers/three_red.gif";
 b3_flash = new Image(); b3_flash.src = "images/buttons/numbers/three_a.gif"; 
 
 b4_on = new Image(); b4_on.src = "images/buttons/numbers/four_on.gif";
 b4_off = new Image(); b4_off.src = "images/buttons/numbers/four_off.gif";
 b4_red = new Image(); b4_red.src = "images/buttons/numbers/four_red.gif";
 b4_flash = new Image(); b4_flash.src = "images/buttons/numbers/four_a.gif"; 
 
 b5_on = new Image(); b5_on.src = "images/buttons/numbers/five_on.gif";
 b5_off = new Image(); b5_off.src = "images/buttons/numbers/five_off.gif";
 b5_flash = new Image(); b5_flash.src = "images/buttons/numbers/five_a.gif";
 
 b6_on = new Image(); b6_on.src = "images/buttons/numbers/six_on.gif";
 b6_off = new Image(); b6_off.src = "images/buttons/numbers/six_off.gif";
 b6_flash = new Image(); b6_flash.src = "images/buttons/numbers/six_a.gif";
 
 b7_on = new Image(); b7_on.src = "images/buttons/numbers/seven_on.gif";
 b7_off = new Image(); b7_off.src = "images/buttons/numbers/seven_off.gif";
 b7_flash = new Image(); b7_flash.src = "images/buttons/numbers/seven_a.gif";
 
 b8_on = new Image(); b8_on.src = "images/buttons/numbers/eight_on.gif";
 b8_off = new Image(); b8_off.src = "images/buttons/numbers/eight_off.gif";
 b8_flash = new Image(); b8_flash.src = "images/buttons/numbers/eight_a.gif";
 
 b9_on = new Image(); b9_on.src = "images/buttons/numbers/nine_on.gif";
 b9_off = new Image(); b9_off.src = "images/buttons/numbers/nine_off.gif";
 b9_a = new Image(); b9_a.src = "images/buttons/numbers/nine_a.gif"; 
 
 arrow_left_on = new Image(); arrow_left_on.src = "images/buttons/numbers/arrow_left_on.gif";
 arrow_left_off = new Image(); arrow_left_off.src = "images/buttons/numbers/arrow_left_off.gif";
 arrow_right_on = new Image(); arrow_right_on.src = "images/buttons/numbers/arrow_right_on.gif";
 arrow_right_off = new Image(); arrow_right_off.src = "images/buttons/numbers/arrow_right_off.gif";
}