////////////////////////////
// CHECK LOGIN FORM //
///////////////////////////
function checkLogin(f) {
	if ( isEmptyOrWhitespace(f.login_username.value) ) {
		alert("Please provide your user name in the space provided.");
		f.login_username.focus();
		return false;
	}
	
	if ( isEmptyOrWhitespace(f.login_password.value) ) {
		alert("Please provide your password in the space provided.");
		f.login_password.focus();
		return false;
	}	
	return true;
}