var plan = 0;
var padd = 0;
function setll(a){
	padd = a;
	document.getElementById("splan").innerHTML = pcomma(plan+padd);
}
function planadd(a,b){
	if(document.xplan.elements[b].checked){
		plan += a;
	}else{
		plan -= a;
	}
	document.getElementById("splan").innerHTML = pcomma(plan+padd);
}
function pcomma(a) {
	var num = new String(a).replace(/,/g, "");
	while(num != (num = num.replace(/^(-?\d+)(\d{3})/, "$1,$2")));
	return num;
}