function showTerms() {
    var terms = document.getElementById('terms');
	if (terms.style.display =='') {
		terms.style.display = 'none';
	}
	else {
 		terms.style.display='';
	}
}

function isDate(dateStr) {
var datePat = /^(\d{1,2})(\/|-)(\d{1,2})(\/|-)(\d{4})$/;
var matchArray = dateStr.match(datePat); // is the format ok?

if (matchArray == null) {
return false;
}

day = matchArray[1]; // parse date into variables
month = matchArray[3];
year = matchArray[5];

if (month < 1 || month > 12) { // check month range

return false;
}

if (day < 1 || day > 31) {

return false;
}

if ((month==4 || month==6 || month==9 || month==11) && day==31) {

return false;
}

if (month == 2) { // check for february 29th
var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
if (day > 29 || (day==29 && !isleap)) {

return false;
}
}
return true; // date is valid
}

function regExCheck(stringToMatch, pattern) {
var matchArray = stringToMatch.match(pattern); 
	if (matchArray == null) {
		return false;
	}
	return true;
}