onload = init;
function init() {
 animujDivy();
 addEvent( document.getElementById(IDbloku), 'mouseout', ADdelay );
}

var IDbloku = 'tady';
var prodleva = '6000';
var Divy, tmp = 0;
function animujDivy() {
 Divy = document.getElementById(IDbloku).getElementsByTagName('div');
 for ( var i=0; i < Divy.length; i++ ) { Divy[i].style.display = 'none' };
 tmp++; if ( tmp > Divy.length-1 ) { tmp = 0 };
 Divy[tmp].style.display = 'block';
 ADdelay();
}
function ADdelay(){ Casovac = setTimeout("animujDivy()",prodleva); }