function preload(variable, filename, width, height) {
	if (document.images) {
		variable = new Image(width,height);
		variable.src = filename;  
	}
}

var home,hhome,spec,hspec,publ,hpubl,cont,hcont,news,hnews;

preload( home, "images/homed.png",103,41);
preload(hhome,"images/hhomed.png",103,41);

preload( spec, "images/specialtiesd.png",132,41);
preload(hspec,"images/hspecialtiesd.png",132,41);

preload( publ, "images/publicationsd.png",162,41);
preload(hpubl,"images/hpublicationsd.png",162,41);

preload( cont, "images/contactd.png",132,41);
preload(hcont,"images/hcontactd.png",132,41);

preload( news, "images/newsd.png",103,41);
preload(hnews,"images/hnewsd.png",103,41);