How to pass additional parameter to ASHX when using Uploadify plugin in ASP.Net

hi gudmrng.I have Doubt How to pass parameteres to ashx 

Code:

<script type="text/javascript">
        $(window).load(function () {
    $("#<%=FileUpload1.ClientID %>").fileUpload({
        'uploader': 'scripts/uploader.swf',
        'cancelImg': 'images/cancel.png',
        'buttonText': 'Browse Files',
        'script': 'Upload.ashx'
        'folder': 'uploads',
        'fileDesc': 'Image Files',
        'fileExt': '*.jpg;*.jpeg;*.gif;*.png',
        'multi': true,
        'auto': true,
        'onComplete': function (event, ID, file, response, data) {
            $("#attachedfiles").append("<tr><td>" + file.name + "</td><td><img src=" + file.filePath + " height='100' width='100' /></td><td><a href = 'javascript:;'>[x]</a></td></tr>");
        }