function NumberFormat(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 ToNative (szStr)

{

	var szRet = '';

	

	for (var i=0; i<szStr.length; i++)

	{

		if (szStr.charAt(i)!=',' && szStr.charAt(i)!='.')

		{

			szRet += szStr.charAt(i);

		}

	}

	

	return szRet;	

}



function FilterDigits(str, bDots)

{

	var szRet = '';

	var y=0;

	

	for (var i=0; i<str.length; i++)

	{

		if (str.charCodeAt(i)>=48 && str.charCodeAt(i) <=57 || (bDots && str.charCodeAt(i)==46))

		{

			szRet += str.charAt(i);

		}

	}

	

	return szRet;

}



function EmptyString(str)

{

	for (var i=0; i<str.length; i++)

	{

		if (str.charCodeAt(i) > 32)

		{

			return false;

		}

	}

	return true;

}



function CalculatePayments ()

{

	var iRate = ($('bcRate').value * 0.01) / 12;
        
	var iDepositValue = ($('bcDeposit').nativeValue)?$('bcDeposit').nativeValue:ToNative($('bcDeposit').value);

	$('bcMonthly').innerHTML = NumberFormat(Math.round(((g_iMandatePrice -iDepositValue) * iRate) / (1 - Math.pow(iRate+1.0, - ($('bcYears').value*12)))));

	$('bcErrors').innerHTML = '';

}



function BondCalc_AdjustInterest (obj, e)

{

	// Prevent invalid keys

	var cKey = (e)?e.keyCode:window.event.keyCode;

	

	if (cKey >= 96) cKey -= 48;

	

	if ((cKey >= 48 && cKey <= 57) || cKey==142 || cKey==62)

	{

		if ((cKey==142 || cKey==62) && obj.value.lastIndexOf('.')!=obj.value.indexOf('.'))

		{

			$('bcErrors').innerHTML = '<strong>Note: </strong>Only one decimal point (.) is allowed in a percentage';

			obj.value = obj.value.substr(0, obj.value.length-1);

		}

		else if ($('bcRate').value == 0)

		{

			$('bcErrors').innerHTML = '<strong>Note: </strong>Interest rate cannot be 0.';

		}

		else

		{

			/*$('bcFinalInterestRate').innerHTML = Math.round(($('bcRate').value - obj.value)*100)/100;*/

			CalculatePayments();

		}

	}

	else if (cKey > 40)

	{

		obj.value = FilterDigits(obj.value, true);

		$('bcErrors').innerHTML = "<strong>Input:</strong> Please use only the digits 0-9, or a normal decimal point (.)";

	}

	

	

	

}



function BondCalc_AdjustYears (obj, e)

{

	// Prevent invalid keys

	var cKey = (e)?e.keyCode:window.event.keyCode;

	

	if (cKey >= 96) cKey -= 48;

	

	if (EmptyString(obj.value)) return;



	if ((cKey >= 48 && cKey <= 57) || cKey == 8)

	{

		if (obj.value > 50)

		{

			obj.value = "50";

			$('bcErrors').innerHTML = "<strong>Note:</strong> Maximum payment period is 50 years.";

		}

		else if (obj.value > 0)

		{

			CalculatePayments();

		}

	}

	else if (cKey > 40)

	{

		obj.value = FilterDigits(obj.value, false);

		$('bcErrors').innerHTML = "<strong>Input:</strong> Please use only the digits 0-9, decimal points are not required.";

	}



}



function BondCalc_AdjustDeposit (obj, e)

{

	// Prevent invalid keys

	var cKey = (e)?e.keyCode:window.event.keyCode;

	

	

	if (cKey >= 96) cKey -= 48;

	

	if (EmptyString(obj.value)) return;



	if ((cKey >= 48 && cKey <= 57) || cKey == 8)

	{

	/*	if (obj.value < g_iMandatePrice*0.1)

		{

			$('bcErrors').innerHTML = "<strong>Note:</strong> Amount for deposit must be at least R" + Math.round(g_iMandatePrice*0.1) + ".";

		}*/

		obj.nativeValue = ToNative(obj.value);

		obj.value = NumberFormat(obj.nativeValue);

				

		if (obj.nativeValue >= g_iMandatePrice)

		{

			$('bcErrors').innerHTML = "<strong>Note: </strong>Your deposit amount is too high.";

		}

		else if (obj.nativeValue > 0)

		{

			CalculatePayments();

		}

	}

	else if (cKey > 40)

	{

		obj.value = NumberFormat(FilterDigits(obj.value, false));

		$('bcErrors').innerHTML = "<strong>Input:</strong> Please use only the digits 0-9, decimal points are not required.";

	}



}