get file extension file upload control in javascript

function getFile(filePath) {
        return filePath.substr(filePath.lastIndexOf('\\') + 1).split('.')[0];
    }

    function getoutput() {
        outputfile.value = getFile(inputfile.value);
        extension.value = inputfile.value.split('.')[1];
    }

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Jepsilon 80 points

                                    &lt;input id='inputfile' type='file' name='inputfile' onChange='getoutput()'&gt;&lt;br&gt;
    Output Filename &lt;input id='outputfile' type='text' name='outputfile'&gt;&lt;br&gt;
    Extension &lt;input id='extension' type='text' name='extension'&gt;

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