function login_set_email() {    
    email = document.getElementById("login_email");
    if(email.value == "email address") {
        email.value = "";
    }
}

function login_clear_email() {
    email = document.getElementById("login_email");
    if(email.value.length == 0) {
        email.value = "email address";
    }
}

function login_set_pass() {
    pass = document.getElementById("login_pass");
    if(pass.value == "password") {
        document.login_form.pass.type = "password";
        pass.value = "";
    }
}

function login_clear_pass() {
    pass = document.getElementById("login_pass");
    if(pass.value.length == 0) {
        document.login_form.pass.type = "text";
        pass.value = "password";
    }
}

function login_submit() {
    document.login_form.submit();
}