function openPDF(PDFdoc)
            {
                // Open a blank window and target PDFdoc into it.
                // PDFdoc = web address (URL) of the PDF document to present in a pop-up window

                wd=screen.availWidth    //width
                ht=screen.availHeight   //.height
                
                sWindowParameters = "scrollbars=1,toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,width=" + wd + " ,height=" + ht +",left=40,top=50";
                window.open(PDFdoc, "pdf", sWindowParameters);            
                
            }