[removed] url containing random number

Question

A friend is linking my page from his site. As I need users to avoid caching when visiting my page, I want the url to have this form:

http://www.mypage.com/index.php?

Answer 1

var lower = 0;
var upper = 100000000;
var url = "http://www.mypage.com/index.php?"+(Math.floor(Math.random()*(upper-lower))+lower)

it generates a random X from 0(lower) to 100000000 (upper), you can obv set the bounds you want ;)