function validateLogin() {

	var username = document.getElementById("username").value;
	var password = document.getElementById("password").value;
	
	var valid = true;

	if (username.length == 0)
	{
		alert ("The user name cannot be blank.");
		valid = false;
	}
	else if (password.length == 0)
	{
		alert ("The password cannot be blank.");
		valid = false;
	}
	
	return valid;
} // end validateLogin