/* CALCULATOR */
var errMsg = "";
var errF;
var d = document.forms[0];
var fel="";

function validateCalc() {
errF = false;
errMsg = "";
txt="";
fel="";
// clean input
$('aSal').value = trim(replaceSubstring(replaceSubstring($('aSal').value,',',''),'$',''));
$('nEmp').value = trim($('nEmp').value);
$('nWeek').value = trim($('nWeek').value);
$('hpWeek').value = trim($('hpWeek').value);

checkEl($('aSal').value,'aSal', 'Average salary',true,true,false,true);
checkEl($('nEmp').value,'nEmp', 'Number of employees',true,true,false,true);
checkEl($('nWeek').value,'nWeek', 'Non paid weeks/year',false,true,true,false);
checkEl($('hpWeek').value,'hpWeek', 'Hours worked/week',true,true,false,true);
if (errF ) {
	$('resultsWrap').setStyle('display', 'none');
	$('errWrap').setStyle('display', 'block');
	return ( false );
}
$('errWrap').setStyle('display', 'none');
$('resultsWrap').setStyle('display', 'block');
return ( true );
}

function checkEl(ev,elid, txt, v1, v2, v3, v4) {
	if (( ev.length==0 ) && (v1)) {
		errMsg =  "enter a value\n";
	} else if ((isNaN(ev)) && (v2)) {
		errMsg = "enter a numeric value\n";
	} else if((ev<0) && (v3)) {
		errMsg = "enter a positive value\n";
	} else if((ev<=0) && (v4)) {
		errMsg = "enter a positive value greater than zero\n";
	}
	
	if ($('mb_error_'+elid)) {$('mb_error_'+elid).remove()}
	
	se = $(elid);
	se.removeClass('inputErr');
	if (errMsg != "" ) {
	  se.addClass('inputErr');
	  if(fel=="") {fel=elid;}
	  errF=true;
	  $(fel).focus();
       var errFlag = new Element('div').setProperty('id', 'mb_error_'+elid).addClass('calcErr').setHTML(errMsg);
       errFlag.injectAfter(elid);
	  return ( false );
     }
}

function compute(){
  if (validateCalc()) {
    calcRes()
  }
}


function calcRes() {
if ($('nWeek').value==null||$('nWeek').value.length==0){
$('nWeek').value=0;}
if ($('aSal').value != 0){
with (Math){
var dsf = 260;
var hoursPerYearWorked = (52-$('nWeek').value)*$('hpWeek').value;
var TotalAnnualCost = (($('aSal').value/hoursPerYearWorked)*dsf)*$('nEmp').value;
var TotalCostPerYear = floor((TotalAnnualCost/1));
var TotalCostPerMonth = floor(TotalCostPerYear/12);
var TotalCostPerWeek = floor(TotalCostPerYear/52);
dspResult(TotalCostPerYear, TotalCostPerMonth, TotalCostPerWeek) 
   }
}
return;
}

// display results
function dspResult(yen, mon, wen) {
      $('rMonth').setHTML(formatCurrency(mon));
      $('rYear').setHTML(formatCurrency(yen));
      $('rWeek').setHTML(formatCurrency(wen));
      doResult() 
}

function resetCalc() {
   dspResult('','','');
   $('aSal').value='';
   $('nEmp').value='';
   $('hpWeek').value='';
   $('nWeek').value='';
}

function trim(aStr) {
	return aStr.replace(/^\s{1,}/, "").replace(/\s{1,}$/, "")
}
function replaceSubstring(fullString,from,to) {
	temp = "" + fullString; // temporary holder
	while (temp.indexOf(from)>-1) {
     	pos= temp.indexOf(from);
	     temp = "" + (temp.substring(0, pos) + to + 
	     temp.substring((pos + from.length), temp.length));
	}
	return temp;
}
function formatCurrency(num) {
num = num.toString().replace(/\$|\,/g,'');
if(isNaN(num))
num = "0";
sign = (num == (num = Math.abs(num)));
num = Math.floor(num*100+0.50000000001);
cents = num%100;
num = Math.floor(num/100).toString();
if(cents<10)
cents = "0" + cents;
for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
num = num.substring(0,num.length-(4*i+3))+','+
num.substring(num.length-(4*i+3));
return (((sign)?'':'-') + '$' + num + '.' + cents);
}

function doResult() {
     exampleFx = new Fx.Style('resultsInner', 'width', {
	duration: 300, 
	transition: Fx.Transitions.quartInOut
});

exampleFx.start(300,0).chain(
	exampleFx.start.pass([0,300], exampleFx)
)

/*  $('resultsInner').effect('width',{
	duration: 1000,
	transition: Fx.Transitions.bounceOut
  }).start(300,0)
  */
}

function doDetailVis(obj) {
var ship=getCheckedValue(document.cartdetailsform.shippingToggle);
if (ship=="2") {
var heightFin=$(cartDetailsTable2).getSize().size.x;
} else {
var heightFin=0
}
var detailFx = new Fx.Style('shipHide', 'height', {
duration: 300, 
transition: Fx.Transitions.quartInOut
});
detailFx.start(heightFin)
}