graphics moving to layers: problem

Hi Forum,

While I'm moving graphics to the another layer.  The desgin (placement of the images) get spoiled. 

The backmost of the image is brought forward to frontmost and hiding all the frontmost image.

Suppose, if the backmost image is page full width and page full height, when the script is run, it comes front most and hiding all the images.

So, how could i maintain the apperences of the images placed sameas, after moved to the "Image Layer" through script.

var allDocumentGraphics = app.activeDocument.allGraphics;

for (i = 0; allDocumentGraphics.length > i; i++) {

    if (allDocumentGraphics[i].constructor.name == "Image") {

allDocumentGraphics[i].parent.itemLayer = "Images"}}

thanks forum.