$.fn.clearForm = function() {
	return this.each(function() {
		var type = this.type, tag = this.tagName.toLowerCase();
		if (tag == 'form')
			return $(':input',this).clearForm();
		if (type == 'text' || type == 'password' || tag == 'textarea')
			this.value = '';
		else if (type == 'checkbox' || type == 'radio')
			this.checked = false;
		else if (tag == 'select')
			this.selectedIndex = -1;
	});
};