2 or 3 selection text frame this script run?
selection = app.activeDocument.selection;
for (var j = 0; j<selection.length; ++j);
var doc = app.properties.activeDocument, myOnjectStyle = doc.objectStyles.itemByName = "myObj1", myObjects, l;
app.findTextPreferences = app.changeTextPreferences = null;
app.findTextPreferences.findWhat = "^a";
myObjects = (app.selection && app.selection[j]).findText () || doc.findText ();
l = myObjects.length;
while(l--) myObjects[l].pageItems[0].appliedObjectStyle = myOnjectStyle;
n = app.selection[j].textFrames.length;
while (n >= 0)
{ try { var islem = app.selection[j].textFrames[n]; islem.appliedObjectStyle = "myObj2"; } catch(_) {} n--;
}