NS=(document.layers)?1:0;
IE=(document.all)?1:0;
divs=new Array('text','catmouse','utro','saidforever','humanism2');

function show(divname) {
 for (i=0; i<divs.length; i++) {
  if (NS) {top.document.layers[divs[i]].visibility="hide"};
  if (IE) {top.document.all[divs[i]].style.visibility="hidden"};
 };
 if (divname!='') {
  if (NS) {top.document.layers[divname].visibility="show"};
  if (IE) {top.document.all[divname].style.visibility="visible"};
 };
}