for (var i = 0; i < Page_Validators.length; i++) {
    var val = Page_Validators[i];
    var ctrl = document.getElementById(val.controltovalidate);
    if (ctrl != null && ctrl.style != null) {
        if (!CheckValidatorsForControl(ctrl))
            ctrl.className = "ValidationOn";
        else
            ctrl.className = "";
    }
}