characterStyle("", "", "SuperScript"); 
characterStyle("", "", "SubScript"); 
function characterStyle(myStart, myEnd, myCharacterStyleName) { 
 
	var myCharacterStyle;  
	var myDoc = app.activeDocument;  
	noCharStyle = app.activeDocument.characterStyles[0];   
	//Create the character style if it does not already exist.  
	myCharacterStyle = myDoc.characterStyles.item(myCharacterStyleName);  
	try{  
		myCharacterStyle.name;  
	}  
	catch (myError){  
		myCharacterStyle = myDoc.characterStyles.add({name:myCharacterStyleName});  
	}  
	app.findPreferences = app.changePreferences = null;   
	  
	start=myDoc.search(myStart,false,false, undefined);   
	stop=myDoc.search(myEnd,false,false, undefined);   
	 
	// there must be at least one occurence of the code at beginning  
	// count of code at beginning has to be equal to count of code at the end  
	if(start.length>0 && start.length == stop.length) {   
		for ( k=start.length-1 ; k >=0 ; k--) {   
			switch (myCharacterStyleName){  
				case "SuperScript":  myCharacterStyle.position = Position.superscript; break; 
				case "SubScript":  myCharacterStyle.position = Position.subscript; break; 
			} 
			 
			st=start[k].parentStory;  
			st.characters.itemByRange(start[k].index, stop[k].index+(myEnd.length-1)).appliedCharacterStyle=myCharacterStyle;  
		}   
		searchAndReplace(myStart,""); 
		searchAndReplace(myEnd,""); 
	}  
} 

<tabelle type="array"> 
<aid:table xmlns:aid="http://ns.adobe.com/AdobeInDesign/3.0/" type="array"> 
	<aid:tr type="array"> 
		<aid:td>Order-No</aid:td> 
		<aid:td>test1</aid:td> 
		<aid:td>test2</aid:td> 
	</aid:tr> 
	<aid:tr type="array"> 
		<aid:td>123</aid:td> 
		<aid:td>bla1abc[/abc]</aid:td> 
		<aid:td>bla2</aid:td> 
	</aid:tr> 
</aid:table> 
</tabelle> 

st=start[k].parentStory;   
st.characters.itemByRange(start[k].index,  stop[k].index+(myEnd.length-1)).appliedCharacterStyle=myCharacterStyle;