function TextBoxSubmitEvent(e, idBtn, validationGroup) {

    var key = (document.all) ? e.keyCode : e.which;

    if (e.keyCode == 13) {
        if (typeof (Page_ClientValidate) == 'function') {
            Page_ClientValidate(validationGroup);
        }        
        if (Page_IsValid) {            
            if (document.getElementById(idBtn)) {               
                __doPostBack(document.getElementById(idBtn).name, '');
            }
        }
    }
}