function dashSSN(ssn) {
	var matchArr = ssn.match(/^(\d{3})-?\d{2}-?\d{4}$/);
	var numDashes = ssn.split('-').length - 1;
	if (matchArr == null)
		msg = "";
	else 
		if (parseInt(matchArr[1],10)==0) 
			msg = "";
		else {
			if(numDashes == 0)
			{
				var first = ssn.substr(0,3);
				var second = ssn.substr(3,2);
				var third = ssn.substr(5,4);
				msg = first + "-" + second + "-" + third;
			}else
				msg = ssn;
	   }
	   return msg;
}//end function