// Checks a string to see if it in a valid date format
// of (D)D/(M)M/(YY)YY and returns true/false
// http://www.qodo.co.uk/blog/javascript-checking-if-a-date-is-valid/
function isValidDate(s) {
	// format D(D)/M(M)/(YY)YY
	var dateFormat = /^\d{1,4}[\.|\/|-]\d{1,2}[\.|\/|-]\d{1,4}$/;
	if (dateFormat.test(s)) {
		// remove any leading zeros from date values
		s = s.replace(/0*(\d*)/gi,"$1");
		var dateArray = s.split(/[\.|\/|-]/);
		// correct month value
		dateArray[1] = dateArray[1]-1;
		// correct year value
		if (dateArray[2].length<4) {
			// correct year value
			dateArray[2] = (parseInt(dateArray[2]) < 50) ? 2000 + parseInt(dateArray[2]) : 1900 + parseInt(dateArray[2]);
		}
		var testDate = new Date(dateArray[2], dateArray[1], dateArray[0]);
		if (testDate.getDate()!=dateArray[0] || testDate.getMonth()!=dateArray[1] || testDate.getFullYear()!=dateArray[2]) {
			return false;
		} else {
			return true;
		}
	} else {
		return false;
	}
}