$(document).delegate('#textbox', 'keydown', function(e) {
var keyCode = e.keyCode || e.which;
if (keyCode == 9) {
e.preventDefault();
var start = this.selectionStart;
var end = this.selectionEnd;
// set textarea value to: text before caret + tab + text after caret
$(this).val($(this).val().substring(0, start)
+ " "
+ $(this).val().substring(end));
// put caret at right position again
this.selectionStart =
this.selectionEnd = start + 1;
}
});