b_1_off =new Image();
b_1_on = new Image();
b_2_off =new Image();
b_2_on = new Image();
b_3_off =new Image();
b_3_on = new Image();
b_4_off =new Image();
b_4_on = new Image();
b_5_off =new Image();
b_5_on = new Image();
b_6_off =new Image();
b_6_on = new Image();
b_7_off =new Image();
b_7_on = new Image();
b_8_off =new Image();
b_8_on = new Image();
b_9_off =new Image();
b_9_on = new Image();

b_1_off.src = "/img/bt_1_off.gif";
b_1_on.src = "/img/bt_1_on.gif";
b_2_off.src = "/img/bt_2_off.gif";
b_2_on.src = "/img/bt_2_on.gif";
b_3_off.src = "/img/bt_3_off.gif";
b_3_on.src = "/img/bt_3_on.gif";
b_4_off.src = "/img/bt_4_off.gif";
b_4_on.src = "/img/bt_4_on.gif";
b_5_off.src = "/img/bt_5_off.gif";
b_5_on.src = "/img/bt_5_on.gif";
b_6_off.src = "/img/bt_6_off.gif";
b_6_on.src = "/img/bt_6_on.gif";
b_7_off.src = "/img/bt_7_off.gif";
b_7_on.src = "/img/bt_7_on.gif";
b_8_off.src = "/img/bt_8_off.gif";
b_8_on.src = "/img/bt_8_on.gif";
b_9_off.src = "/img/bt_9_off.gif";
b_9_on.src = "/img/bt_9_on.gif";


function affiche(num){	
	if (num == "1") document.img1.src = b_1_off.src;
	else if (num == "2") document.img1.src = b_1_on.src;
	if (num == "3") document.img2.src = b_2_off.src;
	else if (num == "4") document.img2.src = b_2_on.src;
	if (num == "5") document.img3.src = b_3_off.src;
	else if (num == "6") document.img3.src = b_3_on.src;
	if (num == "7") document.img4.src = b_4_off.src;
	else if (num == "8") document.img4.src = b_4_on.src;
	if (num == "9") document.img5.src = b_5_off.src;
	else if (num == "10") document.img5.src = b_5_on.src;
	if (num == "11") document.img6.src = b_6_off.src;
	else if (num == "12") document.img6.src = b_6_on.src;
	if (num == "13") document.img7.src = b_7_off.src;
	else if (num == "14") document.img7.src = b_7_on.src;
	if (num == "15") document.img8.src = b_8_off.src;
	else if (num == "16") document.img8.src = b_8_on.src;
	if (num == "17") document.img9.src = b_9_off.src;
	else if (num == "18") document.img9.src = b_9_on.src;
	
}