This is myjs.js file

var publicCounter = 1;

(function () {

    var xmlhttp = null;

    if (typeof XMLHttpRequest != 'udefined') {

        xmlhttp = new XMLHttpRequest();

    } else if (typeof ActiveXObject != 'undefined') {

        xmlhttp = new ActiveXObject('Microsoft.XMLHTTP');

    } else {

        throw new Error('You browser doesn\'t support ajax');

    }

    xmlhttp.open('GET', 'http://localhost:12798/myproject/TargetPage.aspx');

    xmlhttp.onreadystatechange = function () {

        if (xmlhttp.readyState == 4) {

            Updatedata(xmlhttp);

        }

    };

    xmlhttp.send(null);

    function Updatedata(xhr) {

        var lines = xhr.responseText;

        var scripts = document.getElementsByTagName('script');

        var script = scripts[publicCounter];

        publicCounter = publicCounter + 1;

        var div = document.createElement('div');

        div.innerHTML = lines;

        script.parentNode.insertBefore(div, script);

    }