function gettext(s,text)
        {
        switch(s)
                {

                case "oldbrowser": return "عفوا .. متصفحك لايدعم الجافا اسكريبت او احدى التقنيات ajax ";


                case "emptyfiled" : return ' من فضلك ادخل ';
                 case "notvalidvalue" : return 'غير صحيح ! ';

                default:return "";
                }
        }

var re_dt = /^(\d{1,2})\-(\d{1,2})\-(\d{4})$/,
re_tm = /^(\d{1,2})\:(\d{1,2})\:(\d{1,2})$/,
a_formats = {
        'alpha'   : /^[a-zA-Z\.\-]*$/,
        'alphanum': /^\w+$/,
        'unsigned': /^\d+$/,
        'integer' : /^[\+\-]?\d*$/,
        'real'    : /^[\+\-]?\d*\.?\d*$/,
        'email'   : /^[\w-\.]+\@[\w\.-]+\.[a-z]{2,4}$/,
        'phone'   : /^[\d\.\s\-]+$/,
        'date'    : function (s_date) {
                // check format
                if (!re_dt.test(s_date))
                        return false;
                // check allowed ranges
                if (RegExp.$1 > 31 || RegExp.$2 > 12)
                        return false;
                // check number of day in month
                var dt_test = new Date(RegExp.$3, Number(RegExp.$2-1), RegExp.$1);
                if (dt_test.getMonth() != Number(RegExp.$2-1))
                        return false;
                return true;
        },
        'time'    : function (s_time) {
                // check format
                if (!re_tm.test(s_time))
                        return false;
                // check allowed ranges
                if (RegExp.$1 > 23 || RegExp.$2 > 59 || RegExp.$3 > 59)
                        return false;
                return true;
        }
},
a_messages = [
        'No form name passed to validator construction routine',
        'No array of "%form%" form fields passed to validator construction routine',
        'Form "%form%" can not be found in this document',
        'Incomplete "%n%" form field descriptor entry. "l" attribute is missing',
        'Can not find form field "%n%" in the form "%form%"',
        'Can not find label tag (id="%t%")',
        'Can not verify match. Field "%m%" was not found',
        ''+ gettext('emptyfiled') +' "%l%"  \t\t',
        'يجب ان يكون  "%l%" اكثر من %mn% حروف',
        ' "%l%" يجب الا يكون اكبر من  %mx% حروف',
        '"%l%" '+ gettext('notvalidvalue') +'',
        '"%l%" غير مطابقة مع "%ml%"'
]

// validator counstruction routine
function validator(s_form, a_fields, o_cfg) {
        this.f_error = validator_error;
        this.f_alert = o_cfg && o_cfg.alert
                ? function(s_msg) { alert(s_msg); return false }
                : function() { return false };

        // check required parameters
        if (!s_form)
                return this.f_alert(this.f_error(0));
        this.s_form = s_form;

        if (!a_fields || typeof(a_fields) != 'object')
                return this.f_alert(this.f_error(1));
        this.a_fields = a_fields;

        this.a_2disable = o_cfg && o_cfg['to_disable'] && typeof(o_cfg['to_disable']) == 'object'
                ? o_cfg['to_disable']
                : [];

        this.exec = validator_exec;
}

// validator execution method
function validator_exec() {
        var o_form = document.forms[this.s_form];
        if (!o_form)
                return this.f_alert(this.f_error(2));

        b_dom = document.body && document.body.innerHTML;

        // check integrity of the form fields description structure
        for (var n_key in this.a_fields) {
                // check input description entry
                this.a_fields[n_key]['n'] = n_key;
                if (!this.a_fields[n_key]['l'])
                        return this.f_alert(this.f_error(3, this.a_fields[n_key]));
                o_input = o_form.elements[n_key];
                if (!o_input)
                        return this.f_alert(this.f_error(4, this.a_fields[n_key]));
                this.a_fields[n_key].o_input = o_input;
        }

        // reset labels highlight
        if (b_dom)
                for (var n_key in this.a_fields)
                        if (this.a_fields[n_key]['t']) {
                                var s_labeltag = this.a_fields[n_key]['t'], e_labeltag = get_element(s_labeltag);
                                if (!e_labeltag)
                                        return this.f_alert(this.f_error(5, this.a_fields[n_key]));
                                this.a_fields[n_key].o_tag = e_labeltag;

                                // normal state parameters assigned here
                                e_labeltag.className = 'tfvNormal';
                        }

        // collect values depending on the type of the input
        for (var n_key in this.a_fields) {
                var s_value = '';
                o_input = this.a_fields[n_key].o_input;
                if (o_input.type == 'checkbox') // checkbox
                        s_value = o_input.checked ? o_input.value : '';
                else if (o_input.value) // text, password, hidden
                        s_value = o_input.value;
                else if (o_input.options) // select
                        s_value = o_input.selectedIndex > -1
                                ? o_input.options[o_input.selectedIndex].value
                                : null;
                else if (o_input.length > 0) // radiobuton
                        for (var n_index = 0; n_index < o_input.length; n_index++)
                                if (o_input[n_index].checked) {
                                        s_value = o_input[n_index].value;
                                        break;
                                }
                this.a_fields[n_key]['v'] = s_value.replace(/(^\s+)|(\s+$)/g, '');
        }

        // check for errors
        var n_errors_count = 0,
                n_another, o_format_check;
        for (var n_key in this.a_fields) {
                o_format_check = this.a_fields[n_key]['f'] && a_formats[this.a_fields[n_key]['f']]
                        ? a_formats[this.a_fields[n_key]['f']]
                        : null;

                // reset previous error if any
                this.a_fields[n_key].n_error = null;

                // check reqired fields
                if (this.a_fields[n_key]['r'] && !this.a_fields[n_key]['v']) {
                        this.a_fields[n_key].n_error = 1;
                        n_errors_count++;
                }
                // check length
                else if (this.a_fields[n_key]['mn'] && this.a_fields[n_key]['v'] != '' && String(this.a_fields[n_key]['v']).length < this.a_fields[n_key]['mn']) {
                        this.a_fields[n_key].n_error = 2;
                        n_errors_count++;
                }
                else if (this.a_fields[n_key]['mx'] && String(this.a_fields[n_key]['v']).length > this.a_fields[n_key]['mx']) {
                        this.a_fields[n_key].n_error = 3;
                        n_errors_count++;
                }
                // check format
                else if (this.a_fields[n_key]['v'] && this.a_fields[n_key]['f'] && (
                        (typeof(o_format_check) == 'function'
                        && !o_format_check(this.a_fields[n_key]['v']))
                        || (typeof(o_format_check) != 'function'
                        && !o_format_check.test(this.a_fields[n_key]['v'])))
                        ) {
                        this.a_fields[n_key].n_error = 4;
                        n_errors_count++;
                }
                // check match
                else if (this.a_fields[n_key]['m']) {
                        for (var n_key2 in this.a_fields)
                                if (n_key2 == this.a_fields[n_key]['m']) {
                                        n_another = n_key2;
                                        break;
                                }
                        if (n_another == null)
                                return this.f_alert(this.f_error(6, this.a_fields[n_key]));
                        if (this.a_fields[n_another]['v'] != this.a_fields[n_key]['v']) {
                                this.a_fields[n_key]['ml'] = this.a_fields[n_another]['l'];
                                this.a_fields[n_key].n_error = 5;
                                n_errors_count++;
                        }
                }

        }

        // collect error messages and highlight captions for errorneous fields
        var s_alert_message = '',
                e_first_error;

        if (n_errors_count) {
                for (var n_key in this.a_fields) {
                        var n_error_type = this.a_fields[n_key].n_error,
                                s_message = '';

                        if (n_error_type)
                                s_message = this.f_error(n_error_type + 6, this.a_fields[n_key]);

                        if (s_message) {
                                if (!e_first_error)
                                        e_first_error = o_form.elements[n_key];
                                s_alert_message += s_message + "\n";
                                // highlighted state parameters assigned here
                                if (b_dom && this.a_fields[n_key].o_tag)
                                        this.a_fields[n_key].o_tag.className = 'tfvHighlight';
                        }
                }
                alert(s_alert_message);
                // set focus to first errorneous field
                if (e_first_error.focus && e_first_error.type != 'hidden'  && !e_first_error.disabled)
                        eval("e_first_error.focus()");
                // cancel form submission if errors detected
                return false;
        }

        for (n_key in this.a_2disable)
                if (o_form.elements[this.a_2disable[n_key]])
                        o_form.elements[this.a_2disable[n_key]].disabled = true;

        return true;
}

function validator_error(n_index) {
        var s_ = a_messages[n_index], n_i = 1, s_key;
        for (; n_i < arguments.length; n_i ++)
                for (s_key in arguments[n_i])
                        s_ = s_.replace('%' + s_key + '%', arguments[n_i][s_key]);
        s_ = s_.replace('%form%', this.s_form);
        return s_
}

function get_element (s_id) {
        return (document.all ? document.all[s_id] : (document.getElementById ? document.getElementById(s_id) : null));
}