function getdocx(url){
var oReq = new XMLHttpRequest();
var arrayBuffer;
oReq.open('GET', url, true);
oReq.responseType = "arraybuffer";
oReq.onload = function (oEvent) {
  arrayBuffer = oReq.response; // Note: not oReq.responseText
   var binary = '';
   var bytes = new Uint8Array( arrayBuffer );
   var len = bytes.byteLength;
 for (var i = 0; i < len; i++) {
    binary += String.fromCharCode( bytes[ i ] );
 }
var contentfromDocx = window.btoa( binary );
//do what ever you want with this
oReq.send(null);

}