var IMPORTE_CENA	= 33;
var IMPORTE_CUOTA	= [
	[160, 200, 250],
	[190, 240, 300]
];

var cur = new Date();
var lim = new Date(2004, 5, 15);
var IMPORTE_MOD = cur.getTime() < lim.getTime() ? 0 : 1;

var icuo;
var icen;
var itot;

function setVars() {
	icuo = document.getElementById("importecuota");
	icen = document.getElementById("importecena");
	itot = document.getElementById("importetotal");
}
setVars();

function obj(id) { return document.getElementById(id); }

function updatePrices() {
	if(!icuo || !icen || !itot) setVars();
	if(!icuo || !icen || !itot) return false;

	icuo.value = IMPORTE_CUOTA[IMPORTE_MOD][
		obj("situacion0").checked || obj("situacion1").checked || obj("situacion3").checked
		? 0
		: (obj("colegcesg").checked || obj("colegotro").checked
			? 1
			: 2
		)
	];
	icen.value = (document.getElementById("cena1").checked ? IMPORTE_CENA : 0)
		+ (document.getElementById("cena1").checked && document.getElementById("cenaacomp1").checked ? IMPORTE_CENA : 0);
	itot.value = parseFloat(icuo.value) + parseFloat(icen.value);

	for(i=0; i <= 1; i++) {
		document.getElementById("cenaacomp"+i).disabled = !document.getElementById("cena1").checked;
	}
}
updatePrices();