const http = new XMLHttpRequest();
const params = 'frashnum=&action=login&Frm_Logintoken="+results+"&Username=admin&Password=test';
const url = 'http://localhost/XHR/';
var response;
http.open('GET', url, false);
//Send the proper header information along with the request
http.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');


 http.onreadystatechange = function ()
    {
        if(http.readyState === 4)
        {
            if(http.status === 200 || http.status == 0)
            {
                let str = (http.responseText);
                let pattern =/\bgetObj\("Frm_Logintoken"\)\.value = "([^"]+)";/;
                let results = str.match(pattern)[1];
                response = results;
            }
        }
    }
http.send(params);
console.log(response);