// JavaScript Document
function ClearForm(){
	var firstname = document.getElementById('Name');
	var email = document.getElementById('Email');
	var phone= document.getElementById('Phone');
	var msg= document.getElementById('Msg');	
	
	firstname ="";
	email ="";
	phone ="";
	title ="";	
	msg ="";	
	codeinput="";	
}

function formValidator(){
	// Make quick references to our fields
	var firstname = document.getElementById('Name');
	var email = document.getElementById('Email');
	var phone= document.getElementById('Phone');
	var msg= document.getElementById('Msg');		
	
	//check empty for data input 
	if(isEmpty(firstname , "Please input your name")){
		return false;
	}
	if(isEmpty(email, "Please input your email address")){
		return false;
	}
	if(isEmpty(phone, "Please input your phone number")){
		return false;
	}
	if(isEmpty(msg, "Please input your message")){
		return false;
	}
	if(!emailValidator(email, "Please re-type your email address")){
		return false;		
	}
	return true;	

}

function isEmpty(elem, helperMsg){
	if(elem.value.length == 0){
		alert(helperMsg);
		elem.focus(); // set the focus to this input
		return true;
	}
	return false;
}

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 = /^[a-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 == ""){
		alert(helperMsg);
		elem.focus();
		return false;
	}else{
		return true;
	}
}

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;
	}
}