Inserisci le librerie prototype
Fai la chiamata ad ajax;
<script>
function call()
{
var url = 'myscript.asp';

var pars = 'foo=bar';

var target = 'target';

var myAjax = new Ajax.Updater(target, url, {method: 'get', parameters: pars});
}
</script>

<body onload="call;return false;" >

<div id ="target">
</div>