function params_to_uri(form) {
	var result = '';
	for (var i = 0; i < form.length; i++) {
		var el = form.elements[i];
		var type = el.getAttribute('type');
		if (el.value == '') continue;
		if ((type == 'radio') || (type == 'checkbox')) {
			if (el.checked) {
				result = result + encodeURIComponent(el.getAttribute('name'))+'/'+encodeURIComponent(el.value)+'/';
			}
		} else {
			result = result + encodeURIComponent(el.getAttribute('name'))+'/'+encodeURIComponent(el.value)+'/';
		}
	}
	return result;
}