function AddOrSubtractTwoFloats(fltValue1, fltValue2, bAddSubtract) {
    var strNumber1 = fltValue1.toString(); var strNumber2 = fltValue2.toString(); var strResult = ""; if (strNumber1.indexOf(".") > -1 || strNumber2.indexOf(".") > -1) {
        if (strNumber1.indexOf(".") == -1) { strNumber1 = strNumber1 + ".0"; }
        if (strNumber2.indexOf(".") == -1) { strNumber2 = strNumber2 + ".0"; }
        var strDecimals1 = strNumber1.substr(strNumber1.indexOf(".") + 1); var strDecimals2 = strNumber2.substr(strNumber2.indexOf(".") + 1); var strInteger1 = strNumber1.substr(0, strNumber1.indexOf(".")); var strInteger2 = strNumber2.substr(0, strNumber2.indexOf(".")); var bNotSameLength = true; while (bNotSameLength) { if (strDecimals1.length != strDecimals2.length) { if (strDecimals1.length < strDecimals2.length) { strDecimals1 += "0"; } else { strDecimals2 += "0"; } } else { bNotSameLength = false; } }
        var intOriginalDecimalLength = strDecimals1.length; for (var intCharIndex = 0; intCharIndex <= strDecimals1.length - 1; intCharIndex++) { strInteger1 = strInteger1 + strDecimals1.substr(intCharIndex, 1); strInteger2 = strInteger2 + strDecimals2.substr(intCharIndex, 1); }
        var intInteger1 = Number(strInteger1); var intInteger2 = Number(strInteger2); var intResult; if (bAddSubtract) { intResult = intInteger1 + intInteger2; } else { intResult = intInteger1 - intInteger2; }
        strResult = intResult.toString(); for (var intZerosAdded = 0; intZerosAdded < ((intOriginalDecimalLength - strResult.length) + 1); intZerosAdded++) { strResult = "0" + strResult; }
        if (strResult.length >= intOriginalDecimalLength) { strResult = strResult.substring(0, strResult.length - intOriginalDecimalLength) + "." + strResult.substring(strResult.length - intOriginalDecimalLength); } 
    } else { if (bAddSubtract) { strResult = Number(fltValue1) + Number(fltValue2); } else { strResult = Number(fltValue1) - Number(fltValue2); } }
    return Number(strResult);
}
(function(jQuery) {
    jQuery.fn.jStepper = function(options) {
        var opts = jQuery.extend({}, jQuery.fn.jStepper.defaults, options); return this.each(function() {
            var $this = jQuery(this); var o = jQuery.meta ? jQuery.extend({}, opts, $this.data()) : opts; if (o.disableAutocomplete) { $this.attr("autocomplete", "off"); }
            if (jQuery.isFunction($this.mousewheel)) {
                $this.mousewheel(function(objEvent, intDelta) {
                    if (intDelta > 0) { MakeStep(o, 1, null, this); return false; }
                    else if (intDelta < 0) { MakeStep(o, 0, null, this); return false; } 
                });
            }
            $this.keydown(function(e) {
                var key = e.keyCode; if (key == 38) { MakeStep(o, 1, e, this); }
                if (key == 40) { MakeStep(o, 0, e, this); } 
            }); $this.keyup(function(e) { CheckValue(o, this); });
        });
    }; function CheckValue(o, objElm) {
        var $objElm = jQuery(objElm); var strValue = $objElm.val(); if (o.disableNonNumeric) { strValue = strValue.replace(/[^\d\.,\-]/gi, ""); }
        if (o.maxValue !== null) { if (strValue >= o.maxValue) { strValue = o.maxValue; } }
        if (o.minValue !== null) { if (strValue <= o.minValue && strValue != "") { strValue = o.minValue; } }
        $objElm.val(strValue);
    }
    function MakeStep(o, bDirection, keydown, objElm) {
        var $objElm = jQuery(objElm); var stepToUse; if (keydown) { if (keydown.ctrlKey) { stepToUse = o.ctrlStep; } else if (keydown.shiftKey) { stepToUse = o.shiftStep; } else { stepToUse = o.normalStep; } } else { stepToUse = o.normalStep; }
        var numValue = $objElm.val(); var intSelectionStart = numValue.length - objElm.selectionStart; var intSelectionEnd = numValue.length - objElm.selectionEnd; numValue = numValue.replace(/,/g, "."); numValue = numValue.replace(o.decimalSeparator, "."); numValue = numValue + ''; if (numValue.indexOf(".") != -1) { numValue = numValue.match(new RegExp("-{0,1}[0-9]+[\\.][0-9]*")); }
        numValue = numValue + ''; if (numValue.indexOf("-") != -1) { numValue = numValue.match(new RegExp("-{0,1}[0-9]+[\\.]*[0-9]*")); }
        numValue = numValue + ''; numValue = numValue.match(new RegExp("-{0,1}[0-9]+[\\.]*[0-9]*")); if (numValue === "" || numValue == "-" || numValue === null) { numValue = o.defaultValue; }
        if (bDirection == 1) { numValue = AddOrSubtractTwoFloats(numValue, stepToUse, true); } else { numValue = AddOrSubtractTwoFloats(numValue, stepToUse, false); }
        var bLimitReached = false; if (o.maxValue !== null) { if (numValue >= o.maxValue) { numValue = o.maxValue; bLimitReached = true; } }
        if (o.minValue !== null) { if (numValue <= o.minValue) { numValue = o.minValue; bLimitReached = true; } }
        numValue = numValue + ''; if (o.minLength !== null) {
            var intLengthNow = numValue.length; if (numValue.indexOf(".") != -1) { intLengthNow = numValue.indexOf("."); }
            var bIsNegative = false; if (numValue.indexOf("-") != -1) { bIsNegative = true; numValue = numValue.replace(/-/, ""); }
            if (intLengthNow < o.minLength) { for (var i = 1; i <= (o.minLength - intLengthNow); i++) { numValue = '0' + numValue; } }
            if (bIsNegative) { numValue = '-' + numValue; } 
        }
        numValue = numValue + ''; var intDecimalsNow; if (o.minDecimals > 0) {
            var intDecimalsMissing; if (numValue.indexOf(".") != -1) { intDecimalsNow = numValue.length - (numValue.indexOf(".") + 1); if (intDecimalsNow < o.minDecimals) { intDecimalsMissing = o.minDecimals - intDecimalsNow; } } else { intDecimalsMissing = o.minDecimals; numValue = numValue + '.'; }
            for (var intDecimalIndex = 1; intDecimalIndex <= intDecimalsMissing; intDecimalIndex++) { numValue = numValue + '0'; } 
        }
        if (o.maxDecimals > 0) { intDecimalsNow = 0; if (numValue.indexOf(".") != -1) { intDecimalsNow = numValue.length - (numValue.indexOf(".") + 1); if (o.maxDecimals < intDecimalsNow) { numValue = numValue.substring(0, numValue.indexOf(".")) + "." + numValue.substring(numValue.indexOf(".") + 1, numValue.indexOf(".") + 1 + o.maxDecimals); } } }
        if (!o.allowDecimals) { numValue = numValue + ''; numValue = numValue.replace(new RegExp("[\\.].+"), ""); }
        numValue = numValue.replace(/\./, o.decimalSeparator); $objElm.val(numValue); objElm.selectionStart = numValue.length - intSelectionStart; objElm.selectionEnd = numValue.length - intSelectionEnd; CheckValue(o, this); if (o.onStep) { o.onStep($objElm, bDirection, bLimitReached); }
        return false;
    }
    jQuery.fn.jStepper.defaults = { maxValue: null, minValue: null, normalStep: 1, shiftStep: 5, ctrlStep: 10, minLength: null, disableAutocomplete: true, defaultValue: 1, decimalSeparator: ",", allowDecimals: true, minDecimals: 0, maxDecimals: null, disableNonNumeric: true, onStep: null };
})(jQuery);