function check_form (form_name) {
    var form = document.forms[form_name];
    var tmp = form.elements['name'];
    if (tmp.value.length == 0) {
        alert ('Incorrect or empty Name');
        tmp.focus();
        return false;
    }
    tmp = form.elements['email'];
    if ((tmp.value.length == 0) || (tmp.value.search(/^[0-9a-z]([-_.]?[0-9a-z])*@[0-9a-z]([-.]?[0-9a-z])*\.[a-z]{2,3}$/) == -1 )) {
        alert ('Incorrect or empty Email');
        tmp.focus ();
        return false;
    }
        return true;
}