moz0820ex.txt

mozilla developer book examples.

var appSysUtils = Components.classes["@foo.com/appSysUtils;1"].getService(Components.interfaces.appISysUtils);
// Read-write status
var write = appSysUtils.Access(url, appSysUtils.W_OK);
var read = appSysUtils.Access(url, appSysUtils.R_OK);
var rwcheck = document.getElementById('rwCheckbox');
if (read)  {
    if (write && read)
        ro = false;
    else
        ro = true;
    rwcheck.setAttribute('checked', ro);
}