String.prototype.hasStar = function () {
	return (this.indexOf("*") != -1);
};
String.prototype.trim = function () {
	return this.replace(/^\s*/g, "").replace(/\s*$/g, "");
};
String.prototype.isEmpty = function () {
	return (this == "" || this.trim() == "");
};
String.prototype.isNumber = function () {
	return /^\d+$/.test(this);
};
String.prototype.checkFormat = function (format) {
	switch (format) {
	  case "dbDate":
		return /^2[0-9]{3}-[0-9]{1,2}-[0-3][0-9]$/.test(this);
		break;
	  case "email":
		return /^[a-z0-9_.-]+@[a-z0-9_.-]+\.[a-z]{2,6}/i.test(this);
		break;
	  case "number":
		return !isNaN(this);
		break;
	  case "uri":
		return /^[a-z\d.-]+$/.test(this);
		break;
	  default:
		alert("Unkown format: " + format);
		return false;
		break;
	}
};
var formCheck = {init:function () {
	var fs = document.getElementsByTagName("form");
	for (var i = 0; i < fs.length; i++) {
		if (!/noCheck/.test(fs[i].className)) {
			new Listener(fs[i], "submit", formCheck.checkForm).listen();
		}
	}
}, checkForm:function (e) {
	var els, el, labels, label, validation;
	f = e.currentTarget;
	if (f.noCheck) {
		return;
	}
	labels = f.getElementsByTagName("label");
	for (var i = 0; i < labels.length; i++) {
		labels[labels[i].htmlFor] = labels[i].firstChild.data;
	}
	els = f.elements;
	for (var i = 0; i < els.length; i++) {
		el = els[i];
		label = labels[el.id];
		if ((label && (label.hasStar()) || /check/.test(el.className)) && !/noCheck/.test(el.className)) {
			if (/^text|textarea$/.test(el.type)) {
				formCheck.validation = formCheck.checkTxtFiled;
			} else if (el.type == 'checkbox') {
				formCheck.validation = formCheck.checkCheckbox;
			} else {
				if (el.tagName == "SELECT") {
					formCheck.validation = formCheck.checkSelect;
				}
			}
			if (!formCheck.validation(el)) {
				e.preventDefault();
				return;
			}
		}
	}
	return true;
}, checkTxtFiled:function (field, checkFormat) {
	var fieldErr, msg, format;
	fieldErr = this.err[field.name] ? this.err[field.name] : this.err.defaultErr;
	if (typeof fieldErr == "string") {
		msg = fieldErr;
		format = null;
	} else {
		msg = (checkFormat ? fieldErr[2] : fieldErr[0]);
		format = fieldErr[1];
	}
	field.value = field.value.trim();
	if (!checkFormat) {
		if (field.value.isEmpty()) {
			return this.tellIt(field, msg);
		}
		if (format) {
			return this.checkTxtFiled(field, true);
		}
	} else {
		if (!field.value.checkFormat(format)) {
			return this.tellIt(field, msg);
		}
	}
	return true;
}, checkSelect:function (sel) {
	if (sel.selectedIndex == 0) {
		return this.tellIt(sel, this.err[sel.name]);
	}
	return true;
}, checkCheckbox:function (checkbox) {
	if (!checkbox.checked) {
		return this.tellIt(checkbox, this.err[checkbox.name]);
	}
	return true;
}, tellIt:function (el, msg) {
	alert(msg);
	el.focus();
	return false;
}};
new Listener(window, "load", formCheck.init).listen();