<!--
/*
 * NumberFormat v1.0
 * 04/13/2000
 * K. Jenci
 * http://www.mredkj.com
 */

/*
 * NumberFormat -The constructor
 * num - The number to be formatted
 */
function NumberFormat(num)
{
	// member variables
	this.num;
	this.isCommas;
	this.isCurrency;
	this.currencyPrefix;
	this.places;

	// external methods
	this.setNumber = setNumberNF;
	this.toUnformatted = toUnformattedNF;
	this.setCommas = setCommasNF;
	this.setCurrency = setCurrencyNF;
	this.setCurrencyPrefix = setCurrencyPrefixNF;
	this.setPlaces = setPlacesNF;
	this.toFormatted = toFormattedNF;

	// internal methods
	this.getRounded = getRoundedNF;
	this.preserveZeros = preserveZerosNF;

	// setup
	this.setNumber((num==null) ? 0 : num);
	this.setCommas(false);
	this.setCurrency(true);
	this.setCurrencyPrefix('');
	this.setPlaces(2);
}

/*
 * setNumber - Sets the number
 * num - The number to be formatted
 */
function setNumberNF(num)
{
	this.num = num;
}

/*
 * toUnformatted - Returns the number as is (a number)
 */
function toUnformattedNF()
{
	return (this.num);
}

/*
 * setCommas - Sets a switch that indicates if there should be commas
 * isC - true, if should be commas; false, if no commas
 */
function setCommasNF(isC)
{
	this.isCommas = isC;
}

/*
 * setCurrency - Sets a switch that indicates if should be displayed as currency
 * isC - true, if should be currency; false, if not currency
 */
function setCurrencyNF(isC)
{
	this.isCurrency = isC;
}

/*
 * setCurrencyPrefix - Sets the symbol that precedes currency.
 * cp - The symbol
 */
function setCurrencyPrefixNF(cp)
{
	this.currencyPrefix = cp;
}

/*
 * setPlaces - Sets the precision of decimal places
 * p - The number of places
 */
function setPlacesNF(p)
{
	this.places = p;
}

/*
 * toFormatted - Returns the number formatted according to the settings (a string)
 */
function toFormattedNF()
{
	var pos;
	var n = this.num;

	// round decimal places
	n = this.getRounded(n);
	n = this.preserveZeros(n); // this step makes n into a string.

	if (this.isCommas)
	{
		pos = n.indexOf('.');
		if (pos == -1)
		{
			pos = n.length;
		}
		while (pos > 0)
		{
			pos -= 3;
			if (pos <= 0) break;
			n = n.substring(0,pos) + ',' + n.substring(pos, n.length);
		}
	}

	if (this.isCurrency)
	{
		// add dollar sign in front
		n = this.currencyPrefix + n;
	}

	return (n);
}

/*
 * getRounded - Used internally to round a value
 * val - The number to be rounded
 */
function getRoundedNF(val)
{
	var factor;
	var i;

	// round to a certain precision
	factor = 1;
	for (i=0; i<this.places; i++)
	{	factor *= 10; }
	val *= factor;
	val = Math.round(val);
	val /= factor;

	return (val);
}

/*
 * preserveZeros - Used internally to make the number a string
 * 	that preserves zeros at the end of the number
 * val - The number
 */
function preserveZerosNF(val)
{
	var i;

	// make a string - to preserve the zeros at the end
	val = val + '';
	if (this.places == 0) return val; // leave now. no zeros are necessary
	
	var decimalPos = val.indexOf('.');
	if (decimalPos == -1)
	{
		val += '.';
		for (i=0; i<this.places; i++)
		{
			val += '0';
		}
	}
	else
	{
		var actualDecimals = (val.length - 1) - decimalPos;
		var difference = this.places - actualDecimals;
		for (i=0; i<difference; i++)
		{
			val += '0';
		}
	}
	
	return val;
}
//-->