if (document.all || document.getElementById){ //if IE4 or NS6+
document.write('<style type="text/css">\n');
document.write('.dyncontent{display: none; width: 600px; height: 150px;}\n');
document.write('</style>');
}

var curcontentindex=0;
var messages=new Array();

function getElementByClass(classname){
var inc=0;
var alltags=document.all? document.all : document.getElementsByTagName("*");
for (i=0; i<alltags.length; i++){
   if (alltags[i].className==classname)
     messages[inc++]=alltags[i];
}
}

function rotatecontent(){
//get current message index (to show it):
curcontentindex=(curcontentindex<messages.length-1)? curcontentindex+1 : 0;
//get previous message index (to hide it):
prevcontentindex=(curcontentindex==0)? messages.length-1 : curcontentindex-1;
messages[prevcontentindex].style.display="none"; //hide previous message
messages[curcontentindex].style.display="block"; //show current message
}

window.onload=function(){
if (document.all || document.getElementById){
   getElementByClass("hero dyncontent");
   setInterval("rotatecontent()", 3000);
}
}