Código HTML:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>xajax example</title>
<script type="text/javascript">
var xajaxRequestUri="http://localhost/ejemploXAJAX/helloworld.php";
var xajaxDebug=false;
var xajaxStatusMessages=false;
var xajaxWaitCursor=true;
var xajaxDefinedGet=0;
var xajaxDefinedPost=1;
var xajaxLoaded=false;
function xajax_helloWorld(){return xajax.call("helloWorld", arguments, 1);}
function xajax_setColor(){return xajax.call("setColor", arguments, 1);}
function xajax_cargarCombos(){return xajax.call("cargarCombos", arguments, 1);}
</script>
<script type="text/javascript" src="xajax/xajax_js/xajax.js"></script>
<script type="text/javascript">
window.setTimeout(function () { if (!xajaxLoaded) { alert('Error: the xajax Javascript file could not be included. Perhaps the URL is incorrect?\nURL: xajax/xajax_js/xajax.js'); } }, 6000);
</script>
</head>
<body style="text-align:center;">
<div id="div1" name="div1"> </div>
<br/>
<button onclick="xajax_helloWorld(0)" >Click Me</button>
<button onclick="xajax_helloWorld(1)" >CLICK ME</button>
<button onclick="xajax_cargarCombos(0)">Cargar Combos</button>
<select id="colorselect" name="colorselect" onchange="xajax_setColor(document.getElementById('colorselect').value);">
<option value="0">todos</option>
</select>
<script type="text/javascript">
xajax_helloWorld(0); // call the helloWorld function to populate the div on load
xajax_setColor(document.getElementById('colorselect').value); // call the setColor function on load
</script>
</body>
</html>