var oInterval;
var oMons;
var iCurrentMon = 0;

window.onload = function()
{

  oMons = document.getElementById('random_mon');
  if (oMons) {
    oInterval = window.setInterval('ShowNextMon()', 3500);
    ShowNextMon();
    }
}

function ShowNextMon() {	
if (oMons) {
	var oElements = oMons.getElementsByTagName('DIV');
  
	for(var i=0;i < oElements.length;i++) {
		if (i==iCurrentMon) oElements[i].style.display = 'block'; 
		else oElements[i].style.display = 'none'; 
	}
  
	iCurrentMon++;
	if (iCurrentMon>= oElements.length) iCurrentMon=0;
	}
}