function togglePrice(searchIn, needToAdd, value, value_no_tax) {
	value = Math.max(0, value);
	value_no_tax = Math.max(0, value_no_tax);
	$("span.js_price, span.js_price_tax", searchIn).each(function(){
		title = $(this).attr("title");
		if (title == null || title == '') return;
		newvalue = parseFloat(title) + (needToAdd ? 1 : -1) * (this.className == 'js_price' ? value_no_tax : value);
		$(this).attr("title", Math.max(0, newvalue));
		$(this).html(currency(newvalue));
	});
}

function toInt(value) {
	value = parseInt(value);
	if (!value) value = 0;
	return value;
}

function toggleReadOnly(id) {
	obj = document.getElementById(id);
	if (!obj) return;
	obj.readOnly = !obj.readOnly;
	obj.style.background = obj.readOnly ? '#EEE' : '#FFF';
}