Error in screen capture

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C#

Javascript

This s the code i had written to capture a screen(a tablegoogle map) but it is getting no value in var activeX and showing error "null is a null object"...Is there any solution?

function CaptureScreen() {
                try {

                    var activeX = new ActiveXObject("ActiveX.ExeActivator");

          document.parentWindow.moveTo(0, 0);
                    document.parentWindow.resizeTo(document.parentWindow.screen.width, document.parentWindow.screen.height);

                    var table = document.getElementById("tblGoogleMap");


                    var x = document.parentWindow.screenLeft + table.getClientRects()[0].left;
                    var y = document.parentWindow.screenTop + table.getClientRects()[0].top;
                    var width = table.offsetWidth;
                    var height = table.offsetHeight;


//                    //var activeX = new ActiveXObject("ScreenCaptureActiveX.ScreenCapture");
//                    //                            activeX.CaptureScreen(x, y, width, height);




                }

                catch (ex) {
                    if (ex.message == "Automation server can't create object") {

                       $find("mpInstallActivex").show();
                   }
                    else {

                        alert("Message : " + ex.message + " Description : " + ex.description);
                    }
                }
            }