jQuery fileupload not working in IE 8 and 9

Question

This code works in FF and chrome. In IE 8 or 9 I get a 500 error saying a not

Answer 1

On IE if you return data like json when you upload a file you can get this data(json) like this:

done: function (e, datos)
{
try
{
   //This in FF, Chrome, Safari
   data=eval(JSON.parse(datos.result));
}catch (er)
{
    //This in IE
    data=eval(JSON.parse(datos.result[0].documentElement.innerText));
}