OK, try to use like this:
function window.afterrender(sender, eOpts)
{
Ext.onReady(function() {
ConvertNumberToPersion();
});
function ConvertNumberToPersion() {
persian = {
0: '۰',
1: '۱',
2: '۲',
3: '۳',
4: '۴',
5: '۵',
6: '۶',
7: '۷',
8: '۸',
9: '۹'
};
function traverse(el) {
if (el.nodeType == 3) {
var list = el.data.match(/[0-9]/g);
if (list != null && list.length != 0) {
for (var i = 0; i < list.length; i++)
el.data = el.data.replace(list[i], persian[list[i]]);
}
}
for (var i = 0; i < el.childNodes.length; i++) {
traverse(el.childNodes[i]);
}
}
traverse(document.body);
}
}