function init_map()
{
    var path_img = '/PublishingImages/worldmap/';
    var mappa = document.getElementById('wordlwide_map_01_Map');
    if ( mappa != null )
    {
        var aree = mappa.getElementsByTagName('area');
        var img_roll = document.getElementById('ImmagineRoll');
        for ( var i=0; i<aree.length; i++ )
        {
            aree.item(i).item_id = aree.item(i).getAttribute('id');
            aree.item(i).onmouseover =  function() {
                img_roll.src = path_img+this.item_id+'.gif';
            };
            aree.item(i).onmouseout =  function() {
                img_roll.src = path_img+'map.gif';
            };
        }
    }
}