function getFocus() {
    email = document.getElementById("email");
    if (email.value == "your email ...")
        email.value = "";
}
function lostFocus() {
    email = document.getElementById("email");
    if (email.value == "")
        email.value = "your email ...";
}

function sendForm() {
    var email = document.getElementById("email").value;
    var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    
    if (!re.test(email)) 
        alert ("Please type your email address correctly!");
    else
        document.forms[0].submit();
}