Need Flash help.

[Pagz]

I'm trying to make a platform flash game, however I can't seem to get the character to land on the platforms, all he does is move on an invisible straight line. Since I'm very new to flash I can't seem to find where I am going wrong, if someone could point it out to me, it would be greatly appreciated, because at the moment I'm stuck.

Here is the code of the "character"

onClipEvent (load) {
xspeed = 0;
friction = .9
GroundY = _y;
Jumping = false;
JumpPower = 30;
JumpSpeed = 0;
Gravity = 3.5;
}

onClipEvent (enterFrame) {
if (Key.isDown(Key.RIGHT)) {
{
this.walk = true;
this.walkdir = 'east';
this.gotoAndStop('walkeast');
this._x += 7; }
}

else if (Key.isDown(Key.LEFT)) {
this.walk = true;
this.walkdir = 'west';
this.gotoAndStop('walkwest');
this._x -= 7;
} else if (this.walkdir == 'west') {
this.walk = false;
this.gotoAndStop('facewest');
} else if (this.walkdir == 'east') {
this.walk = false;
this.gotoAndStop('faceeast'); }

{
var tmpY;
if(Jumping==true){

JumpSpeed += Gravity;
tmpY = _y + JumpSpeed;
if (Key.isDown(Key.RIGHT)) {
{
this.walk = true;
this.walkdir = 'east';
this.gotoAndStop('jumpeast');
this._x += 7; }
}

if (Key.isDown(Key.LEFT)) {
this.walk = true;
this.walkdir = 'west';
this.gotoAndStop('jumpwest');
this._x -= 7; }
if(tmpY >= GroundY){

tmpY = GroundY;
Jumping=false;
}
_y = tmpY;

}else{


if(Key.isDown(Key.UP)){

JumpSpeed = -JumpPower;
Jumping=true;



}
}
}
}
Knowing me its something very simple, but I have trouble with these things, please help. If I've left anything out, please let me know.

[factotum]

While I'm not much for Flash, I have programmed in other languages, and I'm puzzled by this bit:



if(tmpY >= GroundY){

tmpY = GroundY;
Jumping=false;
}


Isn't that basically saying "if the character is above the ground, move him back to ground level and then stop his jumping"? Which seems to be the OPPOSITE of what you ought to be doing...