app.findTextPreferences = null;  
app.changeTextPreferences = null;  
app.findTextPreferences.findWhat = 'Feuer';  
app.changeTextPreferences.changeTo = '';  
app.changeTextPreferences.appliedCharacterStyle = 'Feuerrot'; 
app.activeDocument.changeText(); 

// ["Gesuchter Begriff", "Name des Zeichenformats"] 
var _searchPairs= [ 
  ["Feuer", "rot"], 
  ["Wasser", "blau"],  
  ["Erde", "braun"], 
  ["Gras", "grün"] 
] ; 
 
if (app.documents.length == 0) { 
  alert ("Es ist kein Dokument offen."); 
  exit(); 
} 
 
var _dok = app.activeDocument; 
 
for( var j = 0; j < _searchPairs.length; j++ ) {   
         
  app.findTextPreferences = app.changeTextPreferences = null; 
  app.findTextPreferences.findWhat = _searchPairs[j][0]; 
 
  var _zf = _dok.characterStyles.itemByName(_searchPairs[j][1]); 
	 
  if (_zf.isValid) { 
  app.changeTextPreferences.appliedCharacterStyle = _dok.characterStyles.itemByName(_searchPairs[j][1]);					 
  app.activeDocument.changeText();  
  } 
  alert ("Achtung!\rEs existiert kein Zeichenformat " + _searchPairs[j][1]); 
  }	 
}