// JavaScript Document
var offer ='';var round ='';var tax ='';var currentService;
window.onload = function totalcost()
{
    if(document.getElementById('subtotalprice'))
    {
		currentService = document.getElementById('subtotalprice').value;
		updateprice();
    }
}
function updateprice()
{
	var saving = document.getElementById('subtotalprice').value * offer;
    document.getElementById('saving').value = penceDoubleZero(Math.round(saving*100)/100);
    var aftertax = (document.getElementById('subtotalprice').value - saving) * tax;
    document.getElementById('vat').value = penceDoubleZero(Math.round(aftertax*100)/100);
    var totalwithoutMOT = document.getElementById('subtotalprice').value-saving+aftertax;
    document.getElementById('total').value = penceDoubleZero(totalwithoutMOT+Number(document.getElementById('additionaloptions').value));
    if(document.getElementById('saving').value < 1)
    {
    	document.getElementById('savingammount').style.display = "none";
    }
    else
    {
    	
    }
}
function changeservice (valuesent)
{
	
    var price = currentService;
    var sub = document.getElementById('subtotalprice').value;
    var oldremoved = sub - price;
    var newprice = oldremoved + valuesent;
	document.getElementById('subtotalprice').value = newprice;
    currentService = valuesent;
    updateprice();
}
function updateservice (valuesent, checked)
{
	if(checked)
	{
		document.getElementById('additionaloptions').value = penceDoubleZero(Number(document.getElementById('additionaloptions').value)+ Number(valuesent));
    }
    else
    {   
    	document.getElementById('additionaloptions').value = penceDoubleZero(Number(document.getElementById('additionaloptions').value) - Number(valuesent)); 
    }
    updateprice();
}

function penceDoubleZero(ammount)
{

    var price_array= String(ammount).split(".");
    var pence = price_array[1];
    if(price_array[1])
    {
        if(pence.length < 2)
        {
            return String(price_array[0])+"."+String(pence)+String("0");
        }
        else
        {
        
        	num = Math.round(ammount*100)/100;
			num = num.toFixed(2);
            return num;
        } 
    }
    else
    {
    	return ammount;
    }
}