"app.findPreferences = null; app.changePreferences = null;" 

topic.pageReferences.add( doc.stories.item(i).insertionPoints[matches[j][0] + j], PageReferenceType.currentPage ); 

// IndexFromCharacterStyle_shortVersion.js 
// 
app.findPreferences = app.changePreferences = null  
app.findPreferences.appliedCharacterStyle = "Index"  
doc = app.activeDocument  
if( doc.indexes.length == 0 )  
	doc.indexes.add()  
f = doc.search()  
for( oneEntry = f.length-1; oneEntry > -1; oneEntry-- ) {  
	doc.indexes[0].topics.add( f[oneEntry].contents )  
	doc.indexes[0].topics.item( f[oneEntry].contents).pageReferences.add( f[oneEntry], PageReferenceType.currentPage )  
} 

// IndexFromCharacterStyle_shortVersionWithFN.js  
//  
app.findPreferences = app.changePreferences = null  
app.findPreferences.appliedCharacterStyle = 'Index'  
doc = app.activeDocument  
if( doc.indexes.length == 0 )  
	doc.indexes.add()  
f = doc.search()  
fnotes = false  
if( f[0].parentStory.footnotes.length > 0 )  
	{  
	fn2en( f[0].parentStory )  
	fnotes = true  
	}  
//need to redo search to get just valid references  
f = doc.search()  
for( k = f.length-1; k > -1; k-- )  
	{  
	doc.indexes[0].topics.add( f[k].contents )  
	doc.indexes[0].topics.item( f[k].contents).pageReferences.add( f[k], PageReferenceType.currentPage )  
	}  
if( fnotes )  
	en2fn( f[0].parentStory )  
 
function fn2en( st )  
{  
var fn = st.footnotes  
for( var k = 0; k < fn.length; k++ )  
	{  
	tf = app.activeDocument.textFrames.add( { label : 'temp'+k } )  
	fn[k].texts[0].move(LocationOptions.after, tf.insertionPoints[-1] )  
	}  
}  
 
function en2fn( st )  
{  
var tf = app.activeDocument.textFrames  
var fn = st.footnotes  
for( var k = fn.length-1; k > -1; k-- )  
	{  
	tf.item( 'temp'+k ).parentStory.texts[0].move( LocationOptions.after, fn[k].insertionPoints[0] )  
	tf.item( 'temp'+k ).remove()  
	}	  
}