function init_dw_Scroll() {
    // arguments: id of div container, id of div to scroll
    var wndo = new dw_scrollObj('wn', 'lyr1');   //first menu
    wndo.setUpScrollControls('scroll_links');    //first menu
	
	var wndo2 = new dw_scrollObj('wn2', 'lyr2');  //second menu
    wndo2.setUpScrollControls('scroll_links2');   //second menu
	
	var wndo3 = new dw_scrollObj('wn3', 'lyr3');  //third menu
    wndo3.setUpScrollControls('scroll_links3');   //third menu
	
	var wndo4 = new dw_scrollObj('wn4', 'lyr4');  //forth menu
    wndo4.setUpScrollControls('scroll_links4');   //forth menu
}

// if necessary objects exists link in the style sheet and call the init function onload

if ( document.getElementById && document.getElementsByTagName ) {
    dw_writeStyleSheet('css/scrollbar_demoMenu.css');
    addLoadEvent(init_dw_Scroll);
}