/* Rotate all pages (or page range) in the document */

// Modify nStart, nEnd and nRotate to change script logic

nStart = 0 // first page to rotate
nEnd = this.numPages - 1; // last page to rotate
nRotate = 90 // allowed rotations: 0, 90, 180, 270

try {
     if (this.numPages > 0) {	
           this.setPageRotations(nStart,nEnd,nRotate)
           }
} 
catch(e)
{
app.alert("Processing error: "+e)
}