<script type="text/javascript">
    var fNewDoc = false;
    var EditDocumentButton = null;
    try {
        EditDocumentButton = new ActiveXObject('SharePoint.OpenDocuments.3');
        if (EditDocumentButton != null) { fNewDoc = true; }
    } catch(e) {}

    var L_EditDocumentError_Text = "Editing not supported.";
    var L_EditDocumentRuntimeError_Text = "Sorry, couldn't open the document.";

    function editDocument(strDocument) {
        if (fNewDoc) {
            if (!EditDocumentButton.EditDocument(strDocument)) {
                alert(L_EditDocumentRuntimeError_Text);
            }
        } else {
            try {
                var hownowPlugin = document.getElementById("winFirefoxPlugin");
                hownowPlugin.EditDocument(strDocument, null);
            } catch (e) { alert(L_EditDocumentError_Text); }
        }
    }
</script>
<object id="winFirefoxPlugin" type="application/x-sharepoint" width="0" height="0" style="visibility: hidden;"></object>