if( app.activeDocument.characterStyles.item( 'ZF' ) == null )    
	{    
		app.activeDocument.characterStyles.add( { name : 'ZF' } );    
	} 

app.findTextPreferences = app.changeTextPreferences = null; 
 
app.findTextPreferences.appliedCharacterStyle = get_cs('cs1'); 
app.changeTextPreferences.appliedCharacterStyle = get_cs('cs2'); 
 
app.activeDocument.changeText(); 
 
app.findTextPreferences = app.changeTextPreferences = null;  
 
 
// prüft Vorhandensein eines Zeichenformats mit best. Namen und legt bei Bedarf ein ZF mit diesem Namen an. 
function get_cs(cs_name) 
{ 
	var cs = null; // Initialisierung der Variable cs 
	cs = app.activeDocument.characterStyles.itemByName(cs_name); 
	if (cs == null) 
		cs = app.activeDocument.characterStyles.add({name:cs_name}); 
	return cs; 
} 

function get_cs(cs_name) 
{ 
	var cs = app.activeDocument.characterStyles.itemByName(cs_name); 
	if (!cs.isValid) 
		cs = app.activeDocument.characterStyles.add({name:cs_name}); 
	return cs; 
} 

//Loop through the find/change operations. 
do{ 
	myLine = myFindChangeFile.readln(); 
	//Ignore comment lines and blank lines. 
	if((myLine.substring(0,4)=="text")||(myLine.substring(0,4)=="grep")||(myLine.substring(0,5)=="glyph")){ 
	myFindChangeArray = myLine.split("\t"); 
	//The first field in the line is the findType string. 
	myFindType = myFindChangeArray[0]; 
	//The second field in the line is the FindPreferences string. 
	myFindPreferences = myFindChangeArray[1]; 
	//The second field in the line is the ChangePreferences string. 
	myChangePreferences = myFindChangeArray[2]; 
	//The fourth field is the range--used only by text find/change. 
	myFindChangeOptions = myFindChangeArray[3]; 

... 
} while(myFindChangeFile.eof == false);