Hello! I am using a JA T3 template which uses mootools (1.3.2). I want to uses modal windows on my Website because of the popup blockers when the user make a selection on a form.

So I use this javascript code

function est(sel)
var f = sel.form;
var opt = sel.options[sel.selectedIndex].value;
if(opt=="Quiero envíar un archivo de texto") From Spanish: I want to send a text file :P
window.addEvent('domready', function() {

SqueezeBox.resize({x: 400, y: 350})
SqueezeBox.open("http://webconomica.com/est/", {
handler: 'iframe',
size: { x: 400, y: 350 }

return true;

and works perfectly fine on Mozilla. But (OF COURSE) on Internet Explorer doesnt:

Message: Argument not valid
Line: 336
Character: 126
Code: 0
URI: http://webconomica.com/media/system/js/mootools-core.js

Mensaje: Object doesnt support this property or method
Line: 383
Character: 1
Code: 0
URI: http://webconomica.com/index.php/formform

Any ideas. ¿Is it better to change and use another kind of popup window? ¿Which one can I use to avoid PopUp blockers?

Thaaaaaaaaaaaaaank you!!