   myHeight = document.documentElement.clientHeight;
               } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
                  //IE 4 compatible
                  myWidth = document.body.clientWidth;
                  myHeight = document.body.clientHeight;
               }
               
               
               x = myWidth - x_displacement;
               
               var ns = (navigator.appName.indexOf("Netscape") != -1);               
        