How can get and set x , y position of opend image ?

Hi,

I used photoshop scripting in back end.

I  am using javascript.

Here i do following step for image adding in layer.

1. Create main window for save psd file.

2. Create new layer in this window i.e. layer1.
3. Open image in separate new window.
4. Copy image from this window.
5. Set focus (back) in main window and i layer1.
6. Past image here.

Here my image is always set on center of layer1.
And i want to set image in given x,y position in layer1

Is any one help me so i can set this pasted image in given x,y position in layer1 ?

Thanks,
Mohit.