Open new actionscript 3.0 flash file and create 5 layers on the timeline. The 5th will be our background, color or image or anything else thats all on you. On the 4th layer create (in this case) 5 buttons, and put them in one line. Leave small spaces between them so it looks nicer. Set their instace names to skyfall_btn, brave_btn, iceage_btn, expandables_btn, batman_btn or any other its all up to you, just make sure those names matches the names in actionscript, otherwise it wont work. Now select all five (or any other number) of them and convert them into movieclip. Set then instance name of this new movieclip to zoznam. Move this movieclip to X=42 or whatever location u want to be the left edge of the menu. Now on 3rd layer draw a rectangle with size of area you want to display and conver this layer into the mask. This way we hide outlines of the movieclip with buttons when it starts moving to the sides. The mask layer should look something like this:

Now on 2nd layer create two buttons, set their instance names to left and the other one right . Move them on left and right side of stage. They will serve as trigger for menu to start moving once you hover your mouse cursor over them. Now select the first frame of layer number one and open actions. Insert the following code.

// function that moves the buttons to right
function MOVEright(){
	zoznam.x=zoznam.x+5;
	if (zoznam.x>42) {
		zoznam.x=42;	//stops the moving if the list hits the edge 
	}
}
//function that moves the buttons to left
function MOVEleft(){
	zoznam.x=zoznam.x-5;
	if (zoznam.x<-496) {
		zoznam.x=-496;	//stops the moving if the list hits the other edge 
	}
}

// function that moves the list of buttons if mouse cursor hovers over moving buttons
// on left or right side and calls the moving functions to move the list of buttons
this.addEventListener( Event.ENTER_FRAME, handleCollision);
function handleCollision( e:Event ):void {
	var _point:Point=localToGlobal(new Point(mouseX,mouseY));
	
	if (right.hitTestPoint(_point.x,_point.y,true)) {		
		MOVEright();
	}	
	if (left.hitTestPoint(_point.x,_point.y,true)) {
		MOVEleft();
	} 
}

//adding functionality to all the buttons
zoznam.brave_btn.addEventListener(MouseEvent.CLICK, BRAVEbtnclick);
function BRAVEbtnclick(ev:MouseEvent):void
{
	var BRAVEurl:URLRequest = new URLRequest("http://google.com"); 
	navigateToURL(BRAVEurl,"_blank");
}

zoznam.skyfall_btn.addEventListener(MouseEvent.CLICK, SKYFALLbtnclick);
function SKYFALLbtnclick(ev:MouseEvent):void
{
	var SKYFALLurl:URLRequest = new URLRequest("http://google.com"); 
	navigateToURL(SKYFALLurl,"_blank");
}

zoznam.iceage_btn.addEventListener(MouseEvent.CLICK, ICEAGEbtnclick); 
function ICEAGEbtnclick(ev:MouseEvent):void
{
	var ICEAGEurl:URLRequest = new URLRequest("http://google.com"); 
	navigateToURL(ICEAGEurl,"_blank");
}

zoznam.expandables_btn.addEventListener(MouseEvent.CLICK, EXPANDbtnclick);
function EXPANDbtnclick(ev:MouseEvent):void
{
	var EXPANDurl:URLRequest = new URLRequest("http://google.com"); 
	navigateToURL(EXPANDurl,"_blank");
}

zoznam.batman_btn.addEventListener(MouseEvent.CLICK, BATMANbtnclick);
function BATMANbtnclick(ev:MouseEvent):void
{
	var BATMANurl:URLRequest = new URLRequest("http://google.com"); 
	navigateToURL(BATMANurl,"_blank");
}

//hides most of the right click menu options
stage.showDefaultContextMenu = false;