HW JS2 Pr3

function tableCD(xh){
  x = JSON.parse(xh.responseText);
  var txt,x,xx,i;
  txt = "<table border='1'><tr><th>Title</th><th>Artist</th></tr>";
  for( i=0; i<x.CD.length; i++ ) {
    txt=txt + "<tr>";
    txt=txt + "<td>" + x.CD[i].TITLE + "</td>";
    txt=txt + "<td>" + xx=x.CD[i].ARTIST + "</td>";
    txt=txt + "</tr>";
  }
  txt=txt + "</table>";
  document.getElementById('txtCDInfo').innerHTML = txt;
}

function averageCD(xh){
  x = JSON.parse(xh.responseText);
  var txt,x,xx,i;
  xx=0;
  txt = "Total of all prices: ";
  for( i=0; i<x.CD.length; i++ )
        xx+=parseFloat(x.CD[i].PRICE);
  txt += parseInt(xx*100)/100;
  xx = xx/x.CD.length
  txt += ", and the average: " + parseInt(xx*100)/100;
  document.getElementById('txtCDInfo').innerHTML = txt;
}

function loadXMLDoc(url, cb) {
    var xmlhttp;
    xmlhttp = new XMLHttpRequest();
    xmlhttp.onreadystatechange=function() {
        if ( xmlhttp.readyState == 4 && xmlhttp.status == 200 ) cb(xmlhttp);
    };

    xmlhttp.open("GET",url,true);
    xmlhttp.send();
}