Select Text on onSetFocus

[rajesh2676]

Hi, when I click on the text box "text_txt.text", zero should be selected.
But it is not happening. I have attached file.

text_txt.text = "0";

text_txt.onSetFocus = function() {
Selection.setFocus("text_txt");
}

But when i write the code (Selection.setFocus("text_txt")) outside the event handler, it works,

text_txt.text = "0";
Selection.setFocus("text_txt");

Please help.