<script type="text/javascript">
var indice = 0;
frases = new Array();
frases[0] = "Texto1";
frases[1] = "Texto2";
frases[2] = "Texto3";
frases[3] = "Texto4";

indice = Math.random()*(frases.length);
indice = Math.floor(indice);

function rotar() {
if (indice == frases.length) {indice = 0;}
document.getElementById("rotando").innerHTML = frases[indice];
indice++;
setTimeout("rotar();",5000);
}
</script>

<div id="rotando" style="height:60px;margin:0px auto;"></div>
<script type="text/javascript">rotar();</script>

<script type="text/javascript">
document.oncontextmenu = function(){return false;}
</script>