VBScript-to-javascript Functions （转）

答案：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!
}

FormatPercent(Expression, NumDigitsAfterDecimal, IncludeLeadingDigit,
               UseParensForNegativeNumbers, GroupDigits)
 - Returns an expression formatted as a percentage (multiplied by 100)
   with a trailing % character.

(NOTE!! This function MUST have FormatNumber
also provided.)

========================================================================


function FormatPercent(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!        
 **********************************************************************/
{
    var tmpStr = new String(FormatNumber(num*100,decimalNum,bolLeadingZero,bolParens,bolCommas));

    if (tmpStr.indexOf(")") != -1) {
        // We know we have a negative number, so place '%' inside of ')'
        tmpStr = tmpStr.substring(0,tmpStr.length - 1) + "%)";
        return tmpStr;
    }
    else
        return tmpStr + "%";            // Return formatted string!
}

FormatCurrency(Expression, NumDigitsAfterDecimal, IncludeLeadingDigit,
               UseParensForNegativeNumbers, GroupDigits)

(NOTE!! This function MUST have FormatNumber
also provided.)
========================================================================

function FormatCurrency(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
   &nb

上一个：用javascirpt在<TEXTAREA>中插入元素（光标位置）,大家看看！
下一个：JS的表格控制例子.