client side unique token generation javascript

1var now = new Date();
2  timestamp = now.getFullYear().toString(); // 2011
3  timestamp += now.getYear().toString(); //  
4  timestamp += now.getMonth(),
5  timestamp += now.getDate(),
6  timestamp += now.getHours();
7  timestamp += now.getMinutes();
8  timestamp += now.getSeconds();
9  timestamp += now.getMilliseconds();
10