Office Automation Document.Open() opening doc as Read-Only in ActiveX from Javascript

Question

This is the closest forum I can find to Office Automation. I apologise if it is the wrong place for this.

If I use Word 2007 to open the document on the web server in my office via the network it opens as editable. If I open the same document from IE 8 using

function editdoc(d) {
    if (browser != 'IE') {
        alert('You must be using Internet Explorer to enable this facility.');
    } else {
        var w=new ActiveXObject('Word.Application');
        var dc = '"'+site+'documents/clients/'+d+'"';
        var docText;
        var obj;
        if (w != null)    {
            w.Visible = true;
            obj=w.Documents.Open(dc);
       
            docText = obj.Content;
            w.ActiveDocument.SaveAs(dc);
   
        }
    }
}

it opens the doucment in Word 2007 on the client machine but in Read-Only format. Please let me know how to open the file as editable.