var getElementsByName = function(tag, name){
    var returns = document.getElementsByName(name);
    if(returns.length > 0) return returns;
     returns = new Array();
    var e = document.getElementsByTagName(tag);
    for(var i = 0; i < e.length; i++){
        if(e[i].getAttribute("name") == name){
             returns[returns.length] = e[i];
         }
     }
    return returns;
}
var diva = getElementsByName("div","a"); 
var len = diva.length;
var div = document.getElementById("one");
div.innerHTML=diva[0].innerHTML;
var i=1;
setInterval(function(){ 
	div.innerHTML=diva[i++].innerHTML;
	if(i==len)
	i=0;
},5000);