// Title: Tigra Form Validator
    // URL: http://www.softcomplex.com/products/tigra_form_validator/
    // Version: 1.3
    // Date: 08/16/2007
    // Notes: This script is free. Visit official site for further details.
     
    // regular expressions or function to validate the format
    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',
    	'"%l%" is een verplicht veld',
    	'Waarde van "%l%" moet minimaal %mn% karakters zijn',
    	'Waarde van "%l%" mag maximaal %mx% karakters zijn',
    	'"%v%" is geen geldige waarde voor "%l%"',
    	'"%l%" moet gelijk zijn aan "%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
    					? o_input.options[o_input.selectedIndex].value
    					: o_input.options[o_input.selectedIndex].text
    				) : 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 ? s_value.replace(/(^\s+)|(\s+$)/g, '') : null;
    	}
     
    	// 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));
    }