description in metadata in cs5

Hi,

Here is a script that output the keywords in the keywords metadata but dont do the same for the description part. (prompt)

addNametoMeta.execute = function(){

var shiftRange = prompt("test", 10);

var descript = prompt("Description", 10);

  var sels = app.document.selections;

  for (var i = 0; i < sels.length; i++){

var md = sels.synchronousMetadata;

    md.namespace = "http://ns.adobe.com/photoshop/1.0/";

    var Name = decodeURI(sels.name).replace(/\.[^\.]+$/, '');

    md.Keywords = md.Keywords + ";" + shiftRange  + ";" +  Name;

md.description[0]  = md.description[0]  + shiftRange +  descript;

  }

}