function CadNews() {
    $('#btEnviarCadNews').attr('disabled', true);
    PageMethods.CadNews($('#txtEmailCadNews').val(), OnSucceededCE, OnFailedCE);
}

function OnSucceededCE(result, userContext, methodName) {
    if (methodName == "CadNews") {
        $('#btEnviarCadNews').attr('disabled', false);
        alert('Seu e-mail foi cadastrado com sucesso!');
    }
}

function OnFailedCE(error, userContext, methodName) {
    if (methodName == "CadNews") {
        $('#btEnviarCadNews').attr('disabled', false);
        alert(error.get_message());
    }
}

if (typeof (Sys) !== "undefined") Sys.Application.notifyScriptLoaded();

$(document).ready(function () {
    $('#txtEmailCadNews').focus(function () {
        if ($(this).val() == 'Digite seu email') {
            $(this).val('');
        }
    });
    $('#txtEmailCadNews').blur(function () {
        if ($(this).val() == '') {
            $(this).val('Digite seu email');
        }
    });
});