function changeFontSize(inc)
{  var p = document.getElementsByTagName('body');  for(n=0; n<p.length; n++) 
{  if(p[n].style.fontSize) 
{  var size = parseInt(p[n].style.fontSize.replace("px", ""));    } else 
{  var size = 12;    }    p[n].style.fontSize = size+inc + 'px';   }}


function gotoLink(form) {
   var OptionIndex=form.listboxurl.selectedIndex;
   parent.location = form.listboxurl.options[OptionIndex].value;}



function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);


// Online Calculator

function addCommas(nStr)
{
	nStr += '';
	x = nStr.split('.');
	x1 = x[0];
	x2 = x.length > 1 ? '.' + x[1] : '';
	var rgx = /(\d+)(\d{3})/;
	while (rgx.test(x1)) {
		x1 = x1.replace(rgx, '$1' + ',' + '$2');
	}
	return x1 + x2;
}

function stripCharsInBag (s) {
var i;
var returnString = "";
var bag;
bag = "£$,"
// Search through string's characters one by one.
// If character is not in bag, append to returnString.
for (i = 0; i < s.length; i++)
{
// Check that current character isn't whitespace.
var c = s.charAt(i);
if (bag.indexOf(c) == -1) returnString += c;
}
return returnString;
}

function computeForm() {
var i=0;
var ffv=0;
ffv+=stripCharsInBag(document.frmCalculator.frmAmount.value);
fmv=0;
var term = 0;
var flatRate = new Array(0.90443,0.782,0.6360);
var showRate = new Array('10.9%','9.7%','7.9%');
term = document.frmCalculator.frmPayPeriod.value;

var displayRate = 0;

if(ffv < 5000) {
i = flatRate[0]*12/100;
displayRate = showRate[0];
}
if(ffv >= 5000) {
i = flatRate[0]*12/100;
displayRate = showRate[0];
} 
if(ffv >= 10000) {
i = flatRate[1]*12/100;
displayRate = showRate[1];
} 
if(ffv >= 25000) {
i = flatRate[2]*12/100;
displayRate = showRate[2];
}

fmv+=term;
i /= 12;
var isn = 1;
var monthPayment
for (var j=0;j<term;j++)
isn=isn*(1+i);
monthPayment = (stripCharsInBag(document.frmCalculator.frmAmount.value)*isn*i)/(isn-1);
fpv = 0;
fpv += monthPayment;
var fmt = "";
var add = 9;
fmt += monthPayment;
for (var i=0;i<fmt.length;i++) {
if (fmt.charAt(i)==".") {
add=i+3;
i=fmt.length;
}
}
fmt=fmt.substring(0,add);
fcalc=((fmv*fpv)-ffv);
var fmtb="";
var add=9;
fmtb+=fcalc;
for (var i=0;i<fmtb.length;i++) {
if (fmtb.charAt(i)==".") {
add=i+3;
i=fmtb.length;
}
}
fmtb=fmtb.substring(0,add);
showPayment = "£"+addCommas(fmt);
//Display results
document.frmCalculator.frmAmount.value = ffv.substring(1,20);
document.frmCalculator.frmPayment.value = showPayment;
document.frmCalculator.frmPercent.value = "APR = "+displayRate;
}



//referrer page
function start() {
var ref = document.getElementById('referrer');
ref.value = document.referrer;
}
onload = start;