var flag = false;

if (document.images)
{
	nav_gallery_on = new Image(102,40);nav_gallery_on.src = '/images/nav_gallery_on.gif';
	nav_calendar_on = new Image(89,40);nav_calendar_on.src = '/images/nav_calendar_on.gif';
	nav_exhib_on=new Image(106,40);nav_exhib_on.src='/images/nav_exhib_on.gif';
    nav_public_on=new Image(163,40);nav_public_on.src='/images/nav_public_on.gif';		
	tools_contact_on=new Image(50,21);tools_contact_on.src='/images/tools_contact_on.gif';
	tools_join_on=new Image(29,21);tools_join_on.src='/images/tools_join_on.gif';
	tools_subscribe_on=new Image(61,21);tools_subscribe_on.src='/images/tools_subscribe_on.gif';
	tools_sitemap_on=new Image(47,21);tools_sitemap_on.src='/images/tools_sitemap_on.gif';
	flag = true;
}


function msover(imgObj){
     if (flag){
                           imgObj.src=eval(imgObj.name + '_on.src');
                            }
}

function msout(imgObj){
       if (flag){
                 imgObj.src='/images/' + imgObj.name + '.gif';
                             }
}