function sendForm(submit, hideOnSuccess, showOnSuccess) {
    var form=$(submit).parent();
    var params = $(form).serialize();
    $.post("logic/register.php", params, function(data) { 
        if (!data) {
            return;
        }
        if (data.validation.length === 1) {
            if (hideOnSuccess != '#send_overlay')
                $(form).slideToggle();
            $(hideOnSuccess).fadeOut();
            $(showOnSuccess).fadeIn();
        } else {
            $(form).find("input").css("border", "1px solid #CCCCCC");
            for (field in data.validation) {
                if (data.validation[field] != "") {
                    $("input[name='" + data.validation[field] + "']").css("border", "1px solid red");
                    $("div#" + data.validation[field]).css("border", "1px solid red");
                }
            }
            $(submit).attr("src","img/btn_send.png");
        }
    }, "json");
}