var emailSubmitNL = document.getElementById("emailSubmitNL");
var errorRed = "#ff0000";

emailSubmitNL.onclick = checkForm

function checkForm()
{
	var emailNL = document.getElementById("emailNL");
	var checkAt = emailNL.value.indexOf("@");
	var checkDot = emailNL.value.indexOf(".");
	
	
	/* validate email address *****************************************************/
	/******************************************************************************/
	if (emailNL.value == "")
	{
		emailNL.style.borderColor = errorRed;
		emailNL.focus();
		return false;
	}
	
	if (checkAt == -1 || checkDot == -1)
	{
		emailNL.style.borderColor = errorRed;
		emailNL.focus();		
		return false;
	}
	else
	{
		emailNL.style.borderColor = errorRed;
	}
	
}