function checkForm()
{
	var f = document.forms[0];
	if (f["name"].value == "")
	{
		alert("Please enter your name.");
		f["name"].focus();
		return false;
	}
	var re = /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/g;
	if (f["email"].value == "" || !f["email"].value.match(re))
	{
		alert("Please type correct email address.");
		f["email"].focus();
		return false;
	}
	return true;
}

function addEventHandler()
{
	if (document.forms.length == 1)
	{
		document.forms[0].onsubmit = new Function("return checkForm()");
	}
}

if (navigator.userAgent.indexOf("Gecko") != -1)
	window.addEventListener("load", addEventHandler, false);
else
	window.attachEvent("onload", addEventHandler);