// JavaScript Document
function formValidator(){
	// Make quick references to our fields
	var c_name = document.getElementById('c_name');
	var c_email = document.getElementById('c_email');
	var c_mobile = document.getElementById('c_mobile');
	var c_msg = document.getElementById('c_msg');
	
	
	
	// Check each input in the order that it appears in the form!
	if(isAlphabet(c_name, "Please enter your name")){
		if(emailValidator(c_email, "Please enter a valid email address")){
			if(isNumeric(c_mobile, "Please enter a valid mobile No...")){
				if(isEmpty(c_msg, "Please enter your message")){
					return true;
			}
		}
	}
}
						return false;
}

function isEmpty(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 = /^[a-zA-Z\ ]+$/;
	if(elem.value.match(alphaExp)){
		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;
	}
}