function callScripto() {
                              try {
                              //create the XMLHttpRequest object
                              netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead");
                              } catch (e) {}
                              var xmlHttpReq = false;
                              var self = this;
                              if (window.XMLHttpRequest) {
                                             self.xmlHttpReq = new XMLHttpRequest();
                              }
                              else if (window.ActiveXObject) {
                                             self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
                              }
                              // pass in the login credentials from the form into the url
                              var form = document.forms['f1'];
                              var username = form.username.value;
                              var password = form.password.value;
                              var url = scriptoURL + scriptName1 + "?username=" + username + "&password=" + password;
                              // post the parameters to Scripto via the url
                              self.xmlHttpReq.open('POST', url, true);
                              self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                              self.xmlHttpReq.onreadystatechange = function() {
                              // when the response is returned, call the getjson() function on the returned string
                                             if (self.xmlHttpReq.readyState == 4) {
                                                                                          getjson(self.xmlHttpReq.responseText);
                                                                           }
                                                            }
                                                            self.xmlHttpReq.send();
               }