function changeval() {
	var opts = document.forms[0].elements['service'];
	var p = document.getElementById("price");
	for (var i = 0; i < opts.length; i++) {
		var o = opts[i];
		if (o.checked) {
			p.value = price[i];
		}
	}
}
function changeval2() {
	var opts = document.forms[0].elements['additionalservices'];
	var p = document.getElementById("addprice");
	var x = 0;
	for (var i = 0; i < opts.length; i++) {
		var o = opts[i];
		if (o.checked) {
			x = x + additionalPrice[i];
		}
	}
	p.value = x;
}