function textLimit(field, maxlen) {
	if (field.value.length > maxlen)
		field.value = field.value.substring(0, maxlen);
}
function formValidator(){
	var firstname = document.getElementById('first_name');
	var lastname = document.getElementById('last_name');
	var phone = document.getElementById('phone');
	var email = document.getElementById('email');
	
	if(isAlphabet(firstname, "Please enter a valid first name.")){
		if(isAlphabet(lastname, "Please enter a valid last name.")){
			if(phoneValidator(phone, "Please enter a valid phone number.")){
				if(emailValidator(email, "Please enter a valid email address.")){
					return true;
				}
			}
		}
	}
	return false;
}
function notEmpty(elem, helperMsg){
	if(elem.value.length == 0){
		alert(helperMsg);
		elem.focus(); // set the focus to this input
		return false;
	}
	return true;
}
function isNumeric(elem, helperMsg){
	var numericExpression = /^[0-9]+$/;
	if(elem.value.match(numericExpression)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}
function isAlphabet(elem, helperMsg){
	var alphaExp = /^[-\sa-zA-Z]+$/;
	if(elem.value.match(alphaExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}
function isAlphanumeric(elem, helperMsg){
	var alphaExp = /^[0-9a-zA-Z]+$/;
	if(elem.value.match(alphaExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}
function lengthRestriction(elem, min, max){
	var uInput = elem.value;
	if(uInput.length >= min && uInput.length <= max){
		return true;
	}else{
		alert("Please enter between " +min+ " and " +max+ " characters");
		elem.focus();
		return false;
	}
}
function madeSelection(elem, helperMsg){
	if(elem.value == "Please Choose"){
		alert(helperMsg);
		elem.focus();
		return false;
	}else{
		return true;
	}
}
function phoneValidator(elem, helperMsg){
	var phoneExp = /^((\+\d{1,3}(-| |.)?\(?\d\)?(-| |.)?\d{1,5})|(\(?\d{2,6}\)?))(-| |.)?(\d{3,4})(-| |.)?(\d{4})(( x| ext)\d{1,5}){0,1}$/;
	if(elem.value.match(phoneExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}
function emailValidator(elem, helperMsg){
	var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
	if(elem.value.match(emailExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}