function alphaValidation(str) {

	var numFilter=/^[a-z A-Z]*$/;
	if (!(str.match(numFilter))) { 
	  return false;
	}
	else {
		return true;
	}
}

//This function is used to trim any string value using javascript.
function trimString (str) {
  return str.replace(/^\s+/g, '').replace(/\s+$/g, '');
}

//This function is used for email validation
function isValid(str) {
	var emailFilter=/^.+@.+\..{2,3}$/;
	if (!(str.match(emailFilter))) { 
        return false;
	}
	else {
		return true;
	}
}