Date validation fails when days overflow.

There is an issue in clientside_validation.js @ line 1193

If today is "January, 30", the line:
var date = new Date();
Is in effect the same as:
var date = new Date(2013, 0, 30);
If we validate the date: "February, 15", consider this code:

// February is equal to 1 in javascript, so month = 1
date.setMonth(month); // we are doing date.setMonth(1);
// Date was "January, 30", we set it as "February, 30", but this makes the date "March, 2" !
if (month !== date.getMonth()) { // fails because: 1 !== 2
  result = false;