Try executing the following in JavaScript:
parseInt('01'); //equals 1
parseInt('02'); //equals 2
parseInt('03'); //equals 3
parseInt('04'); //equals 4
parseInt('05'); //equals 5
parseInt('06'); //equals 6
parseInt('07'); //equals 7
parseInt('08'); //equals 0 !!
parseInt('09'); //equals 0 !!
JavaScript, I just learned (the hard way), thinks that the leading zero indicates an octal integer, and since there is no "8" or "9" in base-8, the function returns zero. Like it or not, this is by design.
What are the workarounds?
Note: For sake of completeness, I'm about to post a solution, but it's a solution that I hate, so please post other/better answers.