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 FormatNumber(Expression, NumDigitsAfterDecimal, IncludeLeadingDigit, UseParensForNegativeNumbers, GroupDigits) ====================================================================== function FormatNumber(num,decimalNum,bolLeadingZero,bolParens,bolCommas) /********************************************************************** IN: NUM - the number to format decimalNum - the number of decimal places to format the number to bolLeadingZero - true / false - display a leading zero for numbers between -1 and 1 bolParens - true / false - use parenthesis around negative numbers bolCommas - put commas as number separators. RETVAL: The formatted number! **********************************************************************/ { if (isNaN(parseInt(num))) return "NaN"; var tmpNum = num; var iSign = num < 0 ? -1 : 1; // Get sign of number // Adjust number so only the specified number of numbers after // the decimal point are shown. tmpNum *= Math.pow(10,decimalNum); tmpNum = Math.round(Math.abs(tmpNum)) tmpNum /= Math.pow(10,decimalNum); tmpNum *= iSign; // Readjust for sign // Create a string object to do our formatting on var tmpNumStr = new String(tmpNum); // See if we need to strip out the leading zero or not. if (!bolLeadingZero && num < 1 && num > -1 && num != 0) if (num > 0) tmpNumStr = tmpNumStr.substring(1,tmpNumStr.length); else tmpNumStr = "-" + tmpNumStr.substring(2,tmpNumStr.length); // See if we need to put in the commas if (bolCommas && (num >= 1000 || num <= -1000)) { var iStart = tmpNumStr.indexOf("."); if (iStart < 0) iStart = tmpNumStr.length; iStart -= 3; while (iStart >= 1) { tmpNumStr = tmpNumStr.substring(0,iStart) + "," + tmpNumStr.substring(iStart,tmpNumStr.length) iStart -= 3; } } // See if we need to use parenthesis if (bolParens && num < 0) tmpNumStr = "(" + tmpNumStr.substring(1,tmpNumStr.length) + ")"; return tmpNumStr; // Return our formatted string! }

 Article Information Article Title: 4GuysFromRolla.com - JavaScript FormatNumber Function Article Author: Scott Mitchell Article URL: http://www.4GuysFromRolla.com/webtech/code/FormatNumber.shtml