function zmen(){
var a = Math.floor(Math.random()*3);
var subor="doc/banner"+a+".swf";
var cas;
if (a==0){cas=16000};
if (a==1){cas=14000};
if (a==2){cas=12000};

var dnuka="<object classid='clsid:D27CDB6E-AE6D-11CF-96B8-444553540000' id='obj' codebase='http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0' border='0' width='500' height='70'>";
dnuka+="<param name='movie' value='";
dnuka+=subor;
dnuka+="'><param name='quality' value='High'><embed src='";
dnuka+=subor;
dnuka+="' pluginspage='http://www.macromedia.com/go/getflashplayer' type='application/x-shockwave-flash' name='obj1' width='500' height='70'>";
dnuka+="</object>";
document.getElementById("obj").outerHTML=dnuka;
window.setTimeout("zmen()",cas);
}