Hello guys, I'm trying to apply pie js for some element added after ajax call, my function looks like :

window.document.ready = function()
{
Wicket.Ajax.registerPostCallHandler(pieStarter);
}
function pieStarter() {
try {
alert(window.navigator.userAgent);
if (window.PIE) {
alert.log(this);
$(' #currentPageTitle, ul#main li, .close')
.each(function() {
alert(this);
//PIE.attach(this);
});
}
} catch (e) {
alert("PIE failed:"+e);
}
}

but every time I recive this error:
error: object doesn't support this property or method

What is wrong ?

This is the fix if anybody has this problem :

function:
window.document.ready = function(){
Wicket.Ajax.registerPostCallHandler(pieStarter); // every time when an ajax request is made
}
function pieStarter(){
if (window.PIE) {
go();
}
}
function go(){
$('.class1,.class2,#id3').each(function(){
PIE.detach(this);
});

$('.class1,.class2,#id3').each(function(){
PIE.attach(this);
});
}