X and Y axis question

Hello,

So what I would like to know is the following…

I want to gotoAndStop(2); If image_btn is greater then say 300 on the X axis… But i am not sure how to go about doing this because i am just starting out in actionscript…

I know it has to be something like this…

[SIZE=1]if (image_btn >= _x(300)){[/SIZE] // Im not sure how to punch in the _x axis…
[SIZE=1] gotoAndStop(2);
}else{
gotoAndStop(3);
}

so if you can help me I would be very happy!
[/SIZE]