function OpenWindow(thePage, theTitle) {
    window.open(thePage, theTitle, 'height=750,width=752,scrollbars=yes,resizable=yes');
}

function $$() {

    emailAddress = document.getElementById("email").value;
    (emailAddress == "") ? alert("- Enter e-mail address") : OpenWindow("http://www.apwa.net/sustainability/email.asp?emailAdd=" + emailAddress + "");
}