// JavaScript Document

	
	
function validate(){
	// Make quick references to our fields
	var name = document.getElementById('name');
	var email = document.getElementById('email');
	var phone =document.getElementById('phone');
	if(isEmpty(name,"Please enter your name")){
		if(emailValidator(email, "Please enter a valid email address")){
			if(isNumeric(phone,"Please enter a valid phone number")){
				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){
	if(elem.value.length==0){
		alert(helperMsg);
		elem.focus();
		return false;
				}
	
	if (elem.value.length!=0){
	var numericExpression = /^[0-9]+[\w\-\.\+]+$/;
	if(elem.value.match(numericExpression)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
		}else{
	return true;
	}
}



function emailValidator(elem, helperMsg){
	if(elem.value.length==0){
		alert(helperMsg);
		elem.focus();
		return false;
				}
	
if (elem.value.length!=0){
	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;
		
		}
	}else{
	return true;
	}

}