//preload images
if (document.images){
 //top level navigation
 home_on  = new Image();
 home_on.src = "WindsorMosaicImages/african-btn-home-red.gif";
 home_off  = new Image();
 home_off.src = "WindsorMosaicImages/african-btn-home-green.gif";

search_on  = new Image();
 search_on.src = "WindsorMosaicImages/african-btn-search-red.gif";
 search_off  = new Image();
 search_off.src = "WindsorMosaicImages/african-btn-search-green.gif";
 
 site_on  = new Image();
 site_on.src = "WindsorMosaicImages/african-btn-site-red.gif";
 site_off  = new Image();
 site_off.src = "WindsorMosaicImages/african-btn-site-green.gif";
 
 about_on  = new Image();
 about_on.src = "WindsorMosaicImages/african-btn-about-red.gif";
 about_off  = new Image();
 about_off.src = "WindsorMosaicImages/african-btn-about-green.gif";
 
 con_on  = new Image();
 con_on.src = "WindsorMosaicImages/african-btn-con-red.gif";
 con_off  = new Image();
 con_off.src = "WindsorMosaicImages/african-btn-con-green.gif";
 
}

function mouseover(imgDocID,imgObjName) {
 if (document.images){
 document.images[imgDocID].src = eval(imgObjName + ".src")
 }
}