document.write('<style type="text/css">');
document.write('.desc { position:absolute; left:0px; top:50px; width:418px; height:420px; overflow:auto; visibility:hidden; }');
document.write('</style>');
var dok = 0;
var sty = 0;
var ie = (document.all) ? true : false;
var ns = (document.layers) ? true : false;
var dom = (document.getElementById) ? true : false;
var i = 0;

if (ie){
 dok = "document.all.";
 sty = ".style";
}
if (ns){
 dok = "document.";
 sty = "";
}
if (dom){
 dok = "document.getElementById('";
 sty = "').style";
}

var HIDDEN = (document.layer) ? 'hide' : 'hidden';

function hide() {
 for (i=1; i<=11; i++){
  eval(dok + 'desc'+ i + sty).visibility = HIDDEN;
  eval(dok + 'desc'+ i + sty).zIndex = 10;
 }
}

function show(object){
 hide();
 eval(dok + object + sty).visibility='visible';
 eval(dok + object + sty).zIndex = 50;
}