function init_dw_Scroll() {
    var wndo = new dw_scrollObj('layerContenant', 'layerContenu');
    wndo.setUpScrollbar("dragBar", "track", "v", 2, 0);
    wndo.setUpScrollControls('scrollbar');
}

// if necessary objects exists link in the style sheet and call the init function onload
if ( document.getElementById && document.getElementsByTagName ) {
    dw_writeStyleSheet('../scripts/css/scrollbarLiens.css')
    addLoadEvent(init_dw_Scroll);
}

function scrollDown() {
	document.getElementById['down'].className="mouseover_down";
}