var pic, alt;
pic = new Array;
pic[0] = "img/001.jpg";
pic[1] = "img/002.jpg";
pic[2] = "img/003.jpg"; 
pic[3] = "img/004.jpg";
pic[4] = "img/005.jpg";
pic[5] = "img/006.jpg"; 
pic[6] = "img/007.jpg";
pic[7] = "img/008.jpg";
pic[8] = "img/009.jpg"; 
pic[9] = "img/010.jpg";
pic[10] = "img/011.jpg"; 

alt = new Array;
alt[0] = "This is a picture of image 0";
alt[1] = "This is a picture of image 1";
alt[2] = "This is a picture of image 2"; 
alt[3] = "This is a picture of image 3";
alt[4] = "This is a picture of image 4";
alt[5] = "This is a picture of image 5"; 
alt[6] = "This is a picture of image 6";
alt[7] = "This is a picture of image 7";
alt[8] = "This is a picture of image 8"; 
alt[9] = "This is a picture of image 9";
alt[10] = "This is a picture of image 10";


var now = new Date();
var seed = now.getTime() % 0xffffffff;

function rand(n) {
seed = (0x015a4e35 * seed) % 0x7fffffff;
return ( seed >> 16 ) % n;
} 

var num = rand(11);

document.write("<img alt='" + alt[num] + "' name='main_image' src='" + pic[num] + "' width='551' height='413' border='0' >");