jQuery(document).ready( function() {
  jQuery('#mc_submit_type').val('js');
  jQuery('#mc_signup_submit').attr('onclick','mc_onclick_button(); return false;');
});

function mc_onclick_button(){
             mc_beforeForm();
             var mc_mv_EMAIL_c = jQuery('#mc_mv_EMAIL').val();
             jQuery.post(mc_ajax_url,{mc_submit_type:'js', mc_mv_EMAIL:  mc_mv_EMAIL_c,mc_signup_submit:'Subscribe'}, mc_success);
            
}

function mc_beforeForm(){
    jQuery('#mc_signup_submit').attr("disabled","disabled");
}

function mc_success(data){
    jQuery('#mc_signup_submit').attr("disabled","");
    jQuery('#mc_message').html(data);   
}