// JavaScript Document


var totalp = document.getElementById("totalp");
var cart = document.getElementById("cart[]");

function calctotal(){
	var totalv = 0;
	for (i=0; i<checkvars.length; i++) {
    	gn = 'cart['+checkvars[i]+']';
    	elem = document.getElementById(gn);
	    if (elem.checked == true) { totalv += Number(elem.value); }
	}
	for (i=0; i<radiovars.length; i++) {
    	gn = 'hdd['+radiovars[i]+']';
    	elem = document.getElementById(gn);
	    if (elem.checked == true) { totalv += Number(elem.value); }
	}
	totalp.innerHTML += totalv;
}

function calctotal2(caller){
	if(caller.checked){
		add(caller)
	} else {
		subtract(caller)
	}
}

function add(caller){ total.value = total.value*1 + caller.value*1}
function subtract(caller){ total.value = total.value*1 - caller.value*1}




function UpdateCost() {
  var sum = 0;
  var gn, elem;
  for (i=0; i<5; i++) {
    gn = 'cart['+i;
    elem = document.getElementById(gn);
    if (elem.checked == true) { sum += Number(elem.value); }
  }
  document.getElementById('totalcost').value = sum.toFixed(2);
}