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

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

var num = rand(4);
// Menu

document.write('<br><a href="http://programming-tutorial.cn983.com/">Home Page - http://programming-tutorial.cn983.com</a> ');