// JavaScript Document


function validateForm(name_elem, password1_elem, password2_elem)
{
	valid = true;
	var p1 = password1_elem.value;
	var p2 = password2_elem.value;
	
	if(isEmpty(name_elem))
	{
		alert('Please enter your username.');
		name_elem.focus(); // set the focus to this input
		valid = false;
	}
	
	if(isEmpty(password1_elem))
	{
		alert('Please enter a password.');
		name_elem.focus(); // set the focus to this input
		valid = false;
	}
	
	
	if(valid==true)
	{
		if(p1 != p2)
		{
			alert('Passwords do not match. Please re-enter password.');
			valid = false;
		}
		
	}
	
	return valid;
	
}

// If the length of the element's string is 0 then display helper message
function isEmpty(elem)
{
	if(elem.value.length == 0)
	{
		
		return true;
	}
	else
	{
		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;
	}
}