AJAX (modified from TigZag tut)

function OnCheckAvailability(){
    var ajaxRequest;
    try{
        ajaxRequest = new XMLHttpRequest();
    } catch (e){
        try{
            ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try{
                ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e){
                alert("Your browser does not support AJAX!");
                return false;
            }
        }
    }
    var qstring = "query="+document.getElementById("question").value;
    ajaxRequest.open("POST", "checkdatabase.asp", true);
    ajaxRequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    ajaxRequest.setRequestHeader("Content-length", qstring.length);
    ajaxRequest.setRequestHeader("Connection", "close");

    ajaxRequest.onreadystatechange = function(){
        if(ajaxRequest.readyState == 4){
            document.getElementById("Available").innerHTML = ajaxRequest.responseText;
        }
    }
    ajaxRequest.send(qstring);
}


JQUERY VERSION
$("#post").click(function(){
        $("#result").html(ajax_load);
        $.post(
            loadUrl,
            {language: "php", version: 5},
            function(responseText){
                $("#result").html(responseText);
            },
            "html"
        );
    });