Sorting a new array from an existing array

 if (main[y] === topicList.getValue()){
        subTopic = [];
        subTopic = fTitle[y]
        trace(subTopic)
}

main = new Array();
main[0] = "one";
main[1] = "two";
main[2] = "three";

topicList = "two";
y = 1;

if (main[y] == topicList)
{ 
        subTopic = new Array(); 
        subTopic[0] = main[y];
        trace(subTopic) 
}

 ////////////////////////////////////////////////////input items in topic listbox 
function setupTopicList() {
	topicList.setAutoHideScrollBar(true);
	f_Topic.reverse();
	sampleList._visible = false;

 for(var item in f_Topic){
	topicList.addItem(f_Topic[item]);
}
topicList.sortItems(upperCaseFunc);
function upperCaseFunc(a,b){
return a.label.toUpperCase() > b.label.toUpperCase();
}
}

////////////////////////////////////////////////////////// input items in feature listbox
function setupFeatureList(p) {
featureList.setAutoHideScrollBar(true);
all = counting.length
featureList.removeAll();
featureList._visible = false;
featureList.setStyle("backgroundColor", "0xC0DFF1");
for(m=0; m<all; m++) {
	if(f_TopicR[p] === fTopic[m]) {  
		featureList._visible = true;
		featureList.addItem(fTitle[m]);
//trace("m of featureList = " + m)
}
}

featureList.sortItems(upperCaseFunc);
function upperCaseFunc(a,b){
return a.label.toUpperCase() > b.label.toUpperCase();
}
}


/////////////////////////// trying to use the topiclist to show 1st of features

function goToFirst(t) {
	if (loaded == filesize) {
		countingall = counting.length
	for( y =0; y < countingall; y++) {
	if (t == fTopic[y]){
		
trace(fTitle[y])
x = y

picture.loadMovie = image[y]; 
titleText.text = description[y];

}}
}

////////////////////////////////////////////////////////////topic list listener
myTopicBoxListener = new Object();
myTopicBoxListener.change = function ( eventObj ){
	var eventSource = eventObj.target;
	var selectedObj = eventSource.selectedItem;
	var q = eventSource.selectedIndex;
	var selectedObjLabel = selectedObj.label;
	var t = eventSource.selectedItem.label;
setupFeatureList(q);
goToFirst(t);


}

topicList.addEventListener ("change", myTopicBoxListener);


///////////////////////////////listens to the feature listbox for command

myListBoxListener = new Object();
myListBoxListener.change = function ( eventObj ){
	var eventSource = eventObj.target;
	var selectedObj = eventSource.selectedItem;
	var p = eventSource.selectedIndex;
	var selectedObjLabel = selectedObj.label;
	var r = eventSource.selectedItem.label;
clickChange(r);
setupsampleList(r);
rojak(r)
}
	
featureList.addEventListener ("change", myListBoxListener);