function checkEmail()
{

var email = document.getElementById("email");

var email2 = document.getElementById("email2");



if(email.value.indexOf("@") != "-1" && email.value.indexOf(".") != "-1")

	{

	if(email.value != email2.value)

		{

		alert("Your email address does not match: "+ email.value);

		return false;

	}

	else

		{

		return true;

		}

	}

	else

	{

	alert("Please be sure to enter in a proper email address.");

	return false;

	}



}


<form method="post" action="" target="_blank" onSubmit="return checkEmail(this);">


<input name="email" class="thin" type="text" id="email" value="email address" onFocus="this.select()">

<input name="email2" class="thin" type="text" id="email2" value="confirm email address" onFocus="this.select()"


</form>