// JavaScript Document
var _move = -1; // -1 = none, 0 = up, 1 = down

function Down() {
if(_move == 0)
return;
_move = 1;
setTimeout(function(){move_down();},64);
}

function Up() {
if(_move == 1)
return;
_move = 0;
setTimeout(function(){move_up();},64);
}

function move_up() {
var scroll_clipper = document.getElementById("scroll_clipper");
scroll_clipper.scrollTop = scroll_clipper.scrollTop > 0 ? scroll_clipper.scrollTop - 5 : 0;
if(_move == 0)
Up();
}

function move_down() {
var scroll_clipper = document.getElementById("scroll_clipper");

scroll_clipper.scrollTop = scroll_clipper.scrollTop + 5;
if(_move == 1)
Down();
}

function clear_move()
{
_move = -1;
return;
}