function codecheck(elem)
{
	var text = elem.value;
	var visible = "hidden";
	if(text.match(/^[-A-Za-z0-9_\.,]+@([-A-Za-z0-9_]+\.)+[-A-Za-z0-9_]+$/))
	{
		visible = "visible";
	}

	var item = document.getElementById("nameLabel");
	item.style.visibility = visible;
	item = document.getElementById("nameValue");
	item.style.visibility = visible;
}