http = getHTTPObject();

function getHTTPObject(){
  var xmlhttp;

  /*@cc_on

  @if (@_jscript_version >= 5)
    try {
      xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
    }catch(e){
      try{
      xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    }catch(E){
      xmlhttp = false;
    }
  }
  @else
    xmlhttp = false;
  @end @*/

  if(!xmlhttp && typeof XMLHttpRequest != 'undefined'){
    try {
      xmlhttp = new XMLHttpRequest();
    }catch(e){
      xmlhttp = false;
    }
  }

  return xmlhttp;
}

function doMath(){
  var url = "helpbackend.asp?op=" + document.getElementById('op').value;
  url += "&num1=" + document.getElementById('num1').value;
  url += "&num2=" + document.getElementById('num2').value;

  url += "&i=" + document.getElementById('num2').value;

  http.open("GET", url, true);
  http.onreadystatechange = handleHttpResponse;

  http.send(null);
}

function PickHelp(i){
  var url = "helpbackend.asp?i=" + i;

  http.open("GET", url, true);
  http.onreadystatechange = handleHttpResponse;

  http.send(null);

}


function handleHttpResponse(){
  if(http.readyState == 4){

	var buf = http.responseText;
	var words = buf.split("~");

    document.getElementById('titleout').innerHTML = words[0];
    document.getElementById('textout').innerHTML = words[1];
    document.getElementById('rightlink').innerHTML = words[3];
    document.getElementById('leftlink').innerHTML = words[2];

  }
}