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function currencyFormatter(oNum,decimalSeparator,groupingNumber,groupingSeparator){
    //check type
    if(isNaN(parseFloat(oNum))){
        alert(oNum + 'is not a number!');
        return "";
    }
    //get sign and make oNum to abstract
    var sign = (oNum == (oNum = Math.abs(oNum)));
    //get fraction
    var nDecimalString = oNum + '';
    var nIndex = nDecimalString.indexOf('.');
    var sFraction = '';
    if(nIndex != -1){
        sFraction = nDecimalString.substr(nIndex);
    }
    //get integer
    var nInteger = parseInt(Math.floor(oNum));
    var nInegerString = nInteger + '';
    //insert separator
    var aResult = [];
    //method 1
    /*
    var length = nInegerString.length;
    for (var i=length; i > 0 ; i-=groupingNumber) {
        var nextI = i - groupingNumber;
        if(nextI <= 0){
            break;
        }
        aResult.unshift(nInegerString.substring(nextI,i));
        aResult.unshift(groupingSeparator);
    };
    if(nextI <= 0){
       &


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