cycling with next and previous buttons

[typeofdoug]

I'm pretty new to action script and have pieced together the bellow code from tutorials and other whatnots. At the bottom you'll see my 'forward/backward' script that cycles through my array. My question is how do I put my index specific buttons in the down state while 'forward/backward' buttons do their magic?

Movieclip.prototype.scrollme = function(xPos) {
//this gets the current X position of the clip calling the function
cX = this._x;
//this works out the distance between its current X position and where it has to go
difX = cX-xPos;
//this sets the new X position of the clip
//the clip moves 1/5th of the total distance every frame
this._x = cX-(difX/5);
};
stop();
//variable starting value
arrayIndex = 1;
//timeline stopping postions
timelineXpos = new Array(0, 0, -760, -1520, 305);
//scrolling animation
timeline.onEnterFrame = function() {
this.scrollme(timelineXpos[arrayIndex]);
};
//buttons that scroll the timeline to specific x positions
//but1
controller_mc.but1.onRollOver = function() {
this.frameHold = this._currentframe;
this.gotoAndStop("over");
};
controller_mc.but1.onRollOut = function() {
this.gotoAndStop(this.frameHold);
};
controller_mc.but1.onRelease = function() {
arrayIndex = 1;
for (var mc in this._parent) {
var thisHold = this;
if ((this._parent[mc] == thisHold) && (this._parent[mc]._name.indexOf("but") != -1)) {
this._parent[mc].gotoAndStop("on");
} else {
this._parent[mc].gotoAndStop("off");
}
}
this.frameHold = this._currentframe;
};
//but2
controller_mc.but2.onRollOver = function() {
this.frameHold = this._currentframe;
this.gotoAndStop("over");
};
controller_mc.but2.onRollOut = function() {
this.gotoAndStop(this.frameHold);
};
controller_mc.but2.onRelease = function() {
arrayIndex = 2;
for (var mc in this._parent) {
var thisHold = this;
if ((this._parent[mc] == thisHold) && (this._parent[mc]._name.indexOf("but") != -1)) {
this._parent[mc].gotoAndStop("on");
} else {
this._parent[mc].gotoAndStop("off");
}
}
this.frameHold = this._currentframe;
};
//but3
//
controller_mc.but3.onRollOver = function() {
this.frameHold = this._currentframe;
this.gotoAndStop("over");
};
controller_mc.but3.onRollOut = function() {
this.gotoAndStop(this.frameHold);
};
controller_mc.but3.onRelease = function() {
arrayIndex = 3;
for (var mc in this._parent) {
var thisHold = this;
if ((this._parent[mc] == thisHold) && (this._parent[mc]._name.indexOf("but") != -1)) {
this._parent[mc].gotoAndStop("on");
} else {
this._parent[mc].gotoAndStop("off");
}
}
this.frameHold = this._currentframe;
};
//
//timeline forward and backward buttons
controller_mc.goForward.onRelease = function() {
if (arrayIndex<3) {
arrayIndex++;
}
};
controller_mc.goBack.onRelease = function() {
if (arrayIndex>1) {
arrayIndex--;
}
};