Mouse panning

Question

hi... my mouse panning not working properly..
my script is---
onClipEvent(load){
    thwidth = this._width;    //Variable for image width
    stwidth = Stage.width;   //Variable for stage width
    speed = 30;
//    The above variable is speed.
//    The higher the value, the slower the image moves.
onClipEvent(enterFrame){
    this._x -= (_root._xmouse-(stwidth/2))/speed;
    //Above line moves the image
    if (this._x>=(0+(thwidth/5))){
        this._x = (0+(thwidth/5));
    //If image reaches the end, then stop it.
    if (this._x<=5){
        this._x =5;
    //Same for opposite side.

Answer 1

The following enterFrame should work if the registration for the movieclip is in the upper left corner:
onClipEvent(enterFrame){
    this._x -= (_root._xmouse-(stwidth/2))/speed;
    //Above line moves the image
    if (this._x>=0){
        this._x = 0;
    //If image reaches the end, then stop it.
    if (this._x<= stwidth-thwidth){
        this._x = stwidth-thwidth;
    //Same for opposite side.