var ajaxcontrol;
function ajaxoutput() {
if (ajaxcontrol.readyState==4) {
document.getElementById("ajaxdata").innerHTML=ajaxcontrol.responseText;
}
}
function domakeobject() {
ajaxcontrol=null;
try {
// Firefox, Opera 8.0+, Safari
ajaxcontrol=new XMLHttpRequest();
}
catch (e) {
// Internet Explorer
try {
ajaxcontrol=new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e){
try {
ajaxcontrol=new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e) {
alert("Your browser does not support ajax!");
return false;
}
}
}

return ajaxcontrol;
}
function doQuery(form){
var article = form.searchtype.options[form.searchtype.options.selectedIndex].value;
var ajaxcontrol = new domakeobject();
if (ajaxcontrol==null) {
alert ("Browser doesn't support ajax.");
return;
}
var url="query.php";
url=url+"?article="+article;
ajaxcontrol.onreadystatechange=ajaxoutput;
ajaxcontrol.open("GET",url,true);
ajaxcontrol.send(null);
}