//---------div hide and unhide functions
function divToggle(id) {
	idList = new Array("auto", "motorcycle", "homeEquity", "secondMortgage", "toys", "nonagriEquipment", "recVehicles", "cds", "unsecured");
	//alert("The Element is " + mydiv.style.visibility);
	//alert("The Element's Display is " + mydiv.style.display);
	
	for(i=0;i<idList.length;i++) {
		if(idList[i]!=id) {
			document.getElementById(idList[i]).style.display = "none";
		}
		else if (idList[i]==id) {
			if(checkDisplay(id)=="block") {
				document.getElementById(idList[i]).style.display = "none";
			}
			else if(checkDisplay(id)=="none") {
				document.getElementById(idList[i]).style.display = "block";
			}
		}
	}
}
function checkDisplay(id) {
	if(document.getElementById(id).style.display=="none")
		return("none");
	else if(document.getElementById(id).style.display=="block")
		return("block");
	else
		return("none");
}

// DROPDOWN SCRIPT [IE6]
sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

// Calculator functions
function floor(number)
{
  return Math.floor(number*Math.pow(10,2))/Math.pow(10,2);
}

function dosum()
{
  var mi = document.temps.IR.value / 1200;
  var base = 1;
  var mbase = 1 + mi;
  for (i=0; i<document.temps.YR.value * 12; i++)
  {
    base = base * mbase
  }
  document.temps.PI.value = floor(document.temps.LA.value * mi / ( 1 - (1/base)))
  document.temps.MT.value = floor(document.temps.AT.value / 12)
  document.temps.MI.value = floor(document.temps.AI.value / 12)
  var dasum = document.temps.LA.value * mi / ( 1 - (1/base)) +
        document.temps.AT.value / 12 + 
        document.temps.AI.value / 12;
  document.temps.MP.value = floor(dasum);
}

function floor(number)
{
  return Math.floor(number*Math.pow(10,2))/Math.pow(10,2);
}

function dosum()
{
  var mi = document.temps.IR.value / 1200;
  var base = 1;
  var mbase = 1 + mi;
  for (i=0; i<document.temps.YR.value * 12; i++)
  {
    base = base * mbase
  }
  document.temps.PI.value = floor(document.temps.LA.value * mi / ( 1 - (1/base)))
  document.temps.MT.value = floor(document.temps.AT.value / 12)
  document.temps.MI.value = floor(document.temps.AI.value / 12)
  var dasum = document.temps.LA.value * mi / ( 1 - (1/base)) +
        document.temps.AT.value / 12 + 
        document.temps.AI.value / 12;
  document.temps.MP.value = floor(dasum);
}

function checkNumber(input, min, max, msg)
{   
	msg = msg + " field has invalid data: " + input.value;
    var str = input.value;
    for (var i = 0; i < str.length; i++)
        {   var ch = str.substring(i, i + 1)
            if ((ch < "0" || ch > "9") && ch != '.')
                {   alert(msg);    return false;    }
        }
    var num = parseFloat(str)
    if (num < min || num > max)
        {   alert(msg + " not in the range " + min + " to " + max);
            return false;
        }
    input.value = str;
    return true;
}
    
function computeField(input)
{   
	if (    input.value != null && input.value.length != 0    )
              input.value = "" + eval(input.value);
    computeForm(input.form);
}

function computeForm(form)
{   
	if (   form.payments.value == null ||
            form.payments.value.length == 0 ||
            form.interest.value == null ||
            form.interest.value.length == 0 ||
            form.principal.value == null ||
            form.principal.value.length == 0  )
        return;
    if (   !checkNumber(form.principal, 100, 9999999, "Principal") ||
            !checkNumber(form.payments, 1, 480, "Number of Payments") ||
            !checkNumber(form.interest, .001, 99, "Interest")    )
        {   form.payment.value = "Invalid";    return;    }
    var i = form.interest.value;
    if (    i < 1    )
        {   i *= 100;    form.interest.value = i;    }
    i /= 1200;
    var pow = 1;
    for (var j = 0; j < form.payments.value; j++)
         pow = pow * (1 + i);
    monthly = (form.principal.value * pow * i) / (pow - 1)
    form.payment.value = Math.ceil(100 * monthly)/100
}

function clearForm(form)
{   
	form.principal.value = "";
    form.payments.value = "";
    form.interest.value = "";
}

<!-- Original:  Michael C. Hundt (mchundt@nglic.com) -->
<!-- Web Site:  http://www.cinet.net/~mhundt/mystuff.htm -->

<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!! http://javascript.internet.com -->

var i = 0; // interest
var m = 0; // months
var f = 0; // factor
var den = 0; 
var s = "0"; // string
var d = 0; // decimal place

function CalcA()
{
	if(document.calform.interest.value=="" || document.calform.months.value=="" || document.calform.payment.value=="") {
	alert("Please fill in all of the required fields.");
} else {
	if(document.calform.period.options[1].selected == true) 
	{
		m = document.calform.months.value * 12;
	} else {
		m = document.calform.months.value;
	}
	i = Math.pow(((document.calform.interest.value/100)+1),.0833333)-1;
	den = i / (i+1);
	f = Math.pow((i+1),m)-1;
	f /= den;
	f *= document.calform.payment.value;
	d = String(f).indexOf(".");
	s = String(f).substring(0,(d+3));
	document.calform.total.value = "$" + s;  
	}
}