<script type="text/javascript">
// <![CDATA[
var speed=100; // speed colours change, 1 second = 1000
var glow=4; // can be set from '0' for no glow, to 10
var raincol=new Array("#ff0000", "#ff9900", "#ffff00", "#99ff00", "#00ff00", "#00ff99", "#00ffff", "#0099ff", "#0000ff", "#9900ff", "#ff00ff", "#ff0099"); // change the colours if you want to
var alink="http://www.mf2fm.com/rv"; // page to link text to (set to ="" for no link)
/****************************
*    Rainbow Text Effect    *
*(c)2003-12 mf2fm web-design*
*  http://www.mf2fm.com/rv  *
* DON'T EDIT BELOW THIS BOX *
****************************/
var rainbow, raintxt, raincnt=0;
window.onload=function() { if (document.getElementById) {
  var i, rainbeau;
  rainbow=document.getElementById("rainbow");
  raintxt=rainbow.firstChild.nodeValue;
  while (rainbow.childNodes.length) rainbow.removeChild(rainbow.childNodes[0]);
  for (i=0; i<raintxt.length; i++) {
    rainbeau=document.createElement("span");
    rainbeau.setAttribute("id", "rain"+i);
    rainbeau.appendChild(document.createTextNode(raintxt.charAt(i)));
    if (alink) {
      rainbeau.style.cursor="pointer";
      rainbeau.onclick=function() { top.location.href=alink; }
    }
    rainbow.appendChild(rainbeau);
  }
  rainbow=setInterval ("raining()", speed);
}}
function raining() {
  var i, c;
  for (i=0; i<raintxt.length; i++) {
    c=raincol[(i+raincnt)%raincol.length];
    document.getElementById("rain"+i).style.color=c;
if (glow) document.getElementById("rain"+i).style.textShadow=c+" 0px 0px "+glow+"px";
  }
  raincnt++;
}
// ]]>
</script>

<span id="rainbow">RAINBOW TEXT</span>