var Aimages = new Array();
var Bimages = new Array();
var Cimages = new Array();

Aimages[1] = "imagesA/pic01.jpg";
Aimages[2] = "imagesA/pic02.jpg";
Aimages[3] = "imagesA/pic03.jpg";
Aimages[4] = "imagesA/pic04.jpg";
Aimages[5] = "imagesA/pic05.jpg";
Aimages[6] = "imagesA/pic06.jpg";
Aimages[7] = "imagesA/pic07.jpg";
Aimages[8] = "imagesA/pic08.jpg";
Aimages[9] = "imagesA/pic09.jpg";
Aimages[10] = "imagesA/pic10.jpg";
Aimages[11] = "imagesA/pic11.jpg";
Aimages[12] = "imagesA/pic12.jpg";

Bimages[1] = "imagesB/pic01.jpg";
Bimages[2] = "imagesB/pic02.jpg";
Bimages[3] = "imagesB/pic03.jpg";
Bimages[4] = "imagesB/pic04.jpg";
Bimages[5] = "imagesB/pic05.jpg";
Bimages[6] = "imagesB/pic06.jpg";
Bimages[7] = "imagesB/pic07.jpg";
Bimages[8] = "imagesB/pic08.jpg";
Bimages[9] = "imagesB/pic09.jpg";
Bimages[10] = "imagesB/pic10.jpg";

Cimages[1] = "imagesC/pic01.jpg";
Cimages[2] = "imagesC/pic02.jpg";
Cimages[3] = "imagesC/pic03.jpg";
Cimages[4] = "imagesC/pic04.jpg";
Cimages[5] = "imagesC/pic05.jpg";
Cimages[6] = "imagesC/pic06.jpg";
Cimages[7] = "imagesC/pic07.jpg";
Cimages[8] = "imagesC/pic08.jpg";
Cimages[9] = "imagesC/pic09.jpg";
Cimages[10] = "imagesC/pic10.jpg";
Cimages[11] = "imagesC/pic11.jpg";

maxA = 12;  // number of imagesA
maxB = 10;  // number of imagesB
maxC = 11;  // number of imagesC

function drawImage() {
    indexA = (Math.floor(Math.random() * 100) % maxA) + 1;
    document.writeln('<td width="258"><img src='+Aimages[indexA]+' width="258" "height="139"></td>');
    indexB = (Math.floor(Math.random() * 100) % maxB) + 1;
    document.writeln('<td width="258"><img src='+Bimages[indexB]+' width="258" "height="139"></td>');
    indexC = (Math.floor(Math.random() * 100) % maxC) + 1;
    document.writeln('<td width="258"><img src='+Cimages[indexC]+' width="258" "height="139"></td>');
}