Find text in pdf with javascript

[Eva]

Hi,
I have installated Acrobat Reader 6.0 on a W2K. Search plug-in is
installed too.
I want to create a javaScript function to find a word (locates cursor
on a text) when I open a pdf.
I've tried it with :

var command = "Search";
if (app.viewerVersion == 6) command = "Find";
app.execMenuItem(command);

and with
search.query("my word");

but they doesn´t work.

If I write
var command = "Search";
if (app.viewerVersion > 5) command = "Find";
app.execMenuItem(command);

i get an error.

what can i do what i want?

Thanks in advanced