function preloadimg(name) {
	var i = new Image();
	eval("i.src = '/commgraph/button_" + name + "_down.gif'");	
}
preloadimg('about');
preloadimg('news');
preloadimg('katalog');
preloadimg('foton');
preloadimg('dialog');
preloadimg('service');
preloadimg('exibs');
preloadimg('map');
preloadimg('contacts');

function putdown(name) {
	eval("document." + name + ".src = '/commgraph/button_" + name + "_down.gif'");
}
function putup(name) {
	eval("document." + name + ".src = '/commgraph/button_" + name + ".gif'");
}