// JavaScript Document


function formatNumber(myNum, numOfDec)

   {

      var decimal = 1

      for(i=1; i<=numOfDec;i++)

         decimal = decimal *10  

      var myFormattedNum = (Math.round(myNum * decimal)/decimal).toFixed(numOfDec)

      return myFormattedNum;

   }  

function getSMOKECOST()

{

sessioncost=200;

cost = document.SMOKEform.cost.value;

costs = parseFloat(cost);

if (isNaN(costs) || (costs==0))

   {

   alert("Please enter a number for your cost per pack");

   }

pack = document.SMOKEform.pack.value;

packs = parseInt(pack);

if (isNaN(packs) || (packs==0))

   {

   alert("Please enter a whole number for the number of packs smoked");

   }

weeklycost = packs*cost;

weekstosave = parseInt(sessioncost/weeklycost)+1;

SMOKECOST = (weeklycost*52)/12;

SMOKECOST = formatNumber(SMOKECOST,2);

oneyearsaving = ((weeklycost*52)-sessioncost);

oneyearsaving = formatNumber(oneyearsaving,2);

document.SMOKEform.SMOKECOST.value = SMOKECOST;

document.SMOKEform.weekstosave.value = weekstosave;

document.SMOKEform.oneyearsaving.value = oneyearsaving;

}