CRM 2011 Get Last Two Character/ Last Character

Have you ever encounter problems such as request for date format to be MMYY or YYMM?
Below i added JavaScript to cater for the problem.


function GenerateYYMM() {

var newvalueMonth;
var valueMonth = new Date().getMonth() + 1;
var valueYear = new Date().getFullYear();

        //get the last 2 character of year
var valueYearLength = valueYear.toString().length;
var YearToString = valueYear.toString();
var last_char=YearToString.charAt(valueYearLength-1);
var Before_last_char=YearToString.charAt(valueYearLength-2);
var LastTwoYearChar = Before_last_char + last_char;

        //get the last 2 character of month with length 2
var valueMonthLength = valueMonth.toString().length;
if (valueMonthLength != 2) {newvalueMonth = "0" + valueMonth.toString();}
else {newvalueMonth = valueMonth.toString();}

var NewYYMM = LastTwoYearChar + newvalueMonth;
return NewYYMM;
}

*Note based on today date. U can use this on any date field too.