Simple Question

Hi all,

I have an action script, which sequetialy loads 6 images.
Can someone please tell me, how can I add to this code an action
for buttons NEXT and BACK?
Thanks for any help.

[color=darkslateblue]var imgDir = “images/”;
var imgNum = 6;
var imgCur = 1;
var imgSelected = null;
var imgLoader = new MovieClipLoader();
imgLoader.onLoadProgress = function(targetMC, loadedBytes, totalBytes) {
eval(imgBtnName).percent_txt.text = Math.round((loadedBytes/totalBytes)*100);
};
imgLoader.onLoadComplete = function(targetMC) {
eval(imgBtnName).gotoAndStop(“loaded”);
eval(imgBtnName).imgToShow = imgMcName;
eval(imgBtnName).percent_txt.text = imgCur;
if (imgCur == 1) {
eval(imgMcName)._alpha = 100;
imgSelected = imgMcName;
}
imgCur++;
loadImg();
};
loadImg = function () {
imgBtnName = “imgBtn”+imgCur+"_mc";
imgMcName = “img”+imgCur+"_mc";
if (imgCur<=imgNum) {
this.attachMovie(“imgBtn”, imgBtnName, this.getNextHighestDepth());
eval(imgBtnName)._x = 20+((imgCur-1)*40);
eval(imgBtnName)._y = 330;
this.createEmptyMovieClip(imgMcName, this.getNextHighestDepth());
eval(imgMcName)._x = 20;
eval(imgMcName)._y = 20;
eval(imgMcName)._alpha = 0;
imgLoader.loadClip(imgDir+imgCur+".jpg", imgMcName);
}
};

[color=darkorange][color=red]nextBT.onRelease = function() {

???

};
backBT.onRelease = function() {

???

};[/color]
[/color]
loadImg();
stop();[/color]