// /app/webroot/js/tabulator.js
function insertTab(event, obj)
{
    var tabKeyCode = 9;
    if (event.which) // mozilla
        var keycode = event.which;
    else // ie
        var keycode = event.keyCode;

    if (keycode == tabKeyCode)
    {
        if (event.type == "keydown")
        {
        	var oldscroll = obj.scrollTop;

            if (obj.setSelectionRange)
            {
                // mozilla
                var s = obj.selectionStart;
                var e = obj.selectionEnd;
                obj.value = obj.value.substring(0, s) + "\t" + obj.value.substr(e);
                obj.setSelectionRange(s + 1, s + 1);
                obj.focus();
            }
            else if (obj.createTextRange)
            {
                // ie
                document.selection.createRange().text = "\t"
                obj.onblur = function() { this.focus(); this.onblur = null; };
            }

            obj.scrollTop = oldscroll;
        }

        if (event.returnValue) // ie ?
            event.returnValue = false;
        if (event.preventDefault) // dom
            event.preventDefault();
        return false; // should work in all browsers
    }
    return true;
}