var http = getHTTPObject();
function getHTTPObject() {
if( window.XMLHttpRequest )
return new window.XMLHttpRequest;
else {
try {
return new ActiveXObject( "MSXML2.XMLHTTP.3.0" );
}
catch( ex ) {
return null;
}
}
}
function doMath() {
var url = "1fix.php?op=" + document.getElementById('op').value;
url += "&num1=" + document.getElementById('num1').value;
url += "&num2=" + document.getElementById('num2').value;
http.open("GET", url, true);
http.onreadystatechange = handleHttpResponse;
http.send(null);
}
function handleHttpResponse() {
if( http.readyState == 4 ) {
document.getElementById('answer').innerHTML = http.responseText;
}
}