/**
   * SCROLLER
   * modified base lib 
   * depends on prototype >= 1.5.0
   * @version 0.0.1
   *
   *
   *
   */
  var IconNavi = {
    x : 0,
    y : 0,
    getCoords : function()
    {
      if(IconNavi.x == 0 && IconNavi.y == 0) {
        coords = $('slsHeader').cumulativeOffset();
        IconNavi.x = coords[0] - 20;
        IconNavi.y = coords[1] - 60;
        $('slsIconNavi').style.left = IconNavi.x + 'px';
  	$('slsIconNavi').style.top = IconNavi.y + 'px';
      }
    }
  }