Please help! how to attach tween classes to my code

programming flash
1

[FONT=Times New Roman][SIZE=3]Hei,[/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3]I’m urgently looking for a solution how to attach tween classes into this code to make movement little smoother. Or to make up the whole thing on tween classes.[/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3](this is background mc which moves up and down when clicking menu buttons).[/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3] [/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3]Here is the code for background mc:[/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3] [/SIZE][/FONT]
[SIZE=3][FONT=Times New Roman]onClipEvent (load) {[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] _x = 0;[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] _y = 0;[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] div = 30; [/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman]}[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman]onClipEvent (enterFrame) {[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] _x += (endX-_x)/div;[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] _y += (endY-_y)/div;[/FONT][/SIZE]
[FONT=Times New Roman][SIZE=3] [/SIZE][/FONT]
[SIZE=3][FONT=Times New Roman] _root.menu1.onRelease = function() {[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] endX = 0;[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] endY = 0;[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] };[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] _root.menu2.onRelease = function() {[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] endX = 0;[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] endY = -500;[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] };[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] _root.menu3.onRelease = function() {[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] endX = 0;[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] endY = -1000;[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] };[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] _root.menu4.onRelease = function() {[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] endX = 0;[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] endY = -1500;[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] };[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] _root.menu5.onRelease = function() {[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] endX = 0;[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] endY = -2000;[/FONT][/SIZE]
[SIZE=3][FONT=Times New Roman] };[/FONT][/SIZE]
[FONT=Times New Roman][SIZE=3]}[/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3] [/SIZE][/FONT]
[SIZE=3][FONT=Times New Roman]Thanx for any help! [/FONT][/SIZE]