alert rectangle size equal to dock.size

Hi forum,    

How do i get alert, if the rectangle size is equal to the document size...

I have the bit.... can anyone tweak this..

if (app.activeWindow.activePage.rectangles.horizontalScale && verticalScale== app.activeDocument.documentPreferences.pageHeight, app.activeDocument.documentPreferences.pageWidth) {

    alert ("rectangle has same size");

    }

thanks & regards,