var banners = new Array('bear','bird','bobcat','chimp','seal');
var x = Math.floor(Math.random()*4.99);

document.write("<style> \n");
document.write("#header { background-image:url(/graphics/headers/sub_header_"+banners[x]+".jpg); } \n");
document.write("#home-header { background-image:url(/graphics/headers/home_header_"+banners[x]+".jpg); } \n");
document.write("<\/style> \n");