var active = 1;

var t;
var timer_is_on=0;

function slajd() {

var ile = $('#zCont').children().length;

var actName = '#logo'+active;
var nextName;
if(active == ile) {nextName = '#logo1';} 
else {nextName = '#logo'+(active+1);}

$(actName).slideToggle(2000, function() {
	if(active == ile) {active = 1;} else {active++;}
	$(nextName).slideToggle(2000);
});

t=setTimeout("slajd()",5000);

}

onload = function doTimer()
{
if (!timer_is_on)
  {
  timer_is_on=1;
  slajd();
  }
}

$(window).ready(function(){
$('#logo1').css("display","block");
});