function makeObject(){ 
    var x; 
    var browser = navigator.appName; 
    if (browser == "Microsoft Internet Explorer"){ 
        x = new ActiveXObject("Microsoft.XMLHTTP"); 
    } else{ 
        x = new XMLHttpRequest(); 
    } 
    return x; 
} 

var request = makeObject(); 

function open() { 
		request.open('get', 'myurl.php?i=' + document.forms[0].i.value + ""); 
        request.onreadystatechange = parseInfo; 
        request.send(""); 
} 

function parseInfo(){ 
    if(request.readyState == 1){ 
        document.getElementById("ajaxBox").innerHTML = "Please wait, loading..."; 
    } else if(request.readyState == 4){ 
        var answer = request.responseText; 
        document.getElementById("ajaxBox").innerHTML = answer; 
    } 
} 
function launch(i) { 
    document.forms[0].i.value=i; 
    open(); 
}