Javascript encoding problem

Hello experts,
I've been learning to hate Javascript. Please help me...

I am working on a page that reads a CVS file and shows it on a text area.

The file (input.csv) is enconded on ISO-8859-1 as shown in Figure 1 and Figure 2.

My page is also encoded as ISO-8859-1 and configured to use ISO-8859-1 as shown in Figure 3.

My page read the file using the following function:

function IO(U, V) {//LA MOD String Version. A tiny ajax library.  by, DanDavis
            var X = !window.XMLHttpRequest ? new ActiveXObject('Microsoft.XMLHTTP')
                        : new XMLHttpRequest();
            X.open(V ? 'PUT' : 'GET', U, false);
            X.setRequestHeader('Content-Type', 'text/html;charset=iso-8859-1')
            X.send(V ? V : '');
            return X.responseText.toUpperCase();
      }

Figure 4 shows how the Text Area looks like when I do:
        text = IO("input.csv");
        othersConsole.value = text;

I am using Safari.

What am I missing???

Thanks!!
Rodrigo.

Figure1.png
Figure2.png
Figure3.png
Figure4.png