//assignCharstyle.jsx 
if (app.documents.length != 0){ 
				var myCharacterStyleName; 
				var myCharacterStyleName ="Bold Italic"; 
				myDefineCharacterStyle(myCharacterStyleName,"fontStyle"); 
				var myCharacterStyleName ="Bold"; 
				myDefineCharacterStyle(myCharacterStyleName,"fontStyle"); 
				var myCharacterStyleName ="Italic"; 
				myDefineCharacterStyle(myCharacterStyleName,"fontStyle"); 
				var myCharacterStyleName ="SuperScript"; 
				myDefineCharacterStyle(myCharacterStyleName,"SuperScript"); 
} 
else{ 
	alert("No documents are open. Please open a document, select some text, and try again."); 
} 
 
function myDefineCharacterStyle(myCharacterStyleName,myProp){ 
	var myCharacterStyle; 
	var myDocument = app.activeDocument; 
	noCharStyle = app.activeDocument.characterStyles[0];  
	//Create the character style if it does not already exist. 
	myCharacterStyle = myDocument.characterStyles.item(myCharacterStyleName); 
	try{ 
		myCharacterStyle.name; 
	} 
	catch (myError){ 
		myCharacterStyle = myDocument.characterStyles.add({name:myCharacterStyleName}); 
	} 
	app.findPreferences = null; app.changePreferences = null; 
	switch (myProp){ 
		case "fontStyle":  
			myCharacterStyle.fontStyle = myCharacterStyleName;  
			myDocument.search("",false,false,undefined,{appliedCharacterStyle:noCharStyle,fontStyle:myCharacterStyleName},{appliedCharacterStyle:myCharacterStyle}); 
			break; 
		case "SuperScript":  
			myCharacterStyle.position = Position.superscript;  
			myDocument.search("",false,false,undefined,{appliedCharacterStyle:noCharStyle,position:Position.superscript},{appliedCharacterStyle:myCharacterStyle}); 
			break; 
	} 
}