Es parecido a lo que kieres, espero que te sirva.
Saludos
JJ
<SCRIPT LANGUAGE="JavaScript">
<!-- Original: Michael Tartaglia (
[email protected]) -->
<!-- Web Site: http://travel.to/html-hell
<!-- Begin
dw=0; //change in width;
dh=0; //change in height;
function jitter() {
w = (Math.round(Math.random()*10)%5)-2; dw+=w;
h = (Math.round(Math.random()*10)%5)-2; dh+=h;
if (dh>10) {h=(0-11);dh=0;}
else if (dh<(0-10)) {h=11;dh=0;}
if (dw>10) {w=(0-11);dw=0;}
else if (dw<(0-10)) {w=11;dw=0;}
vers = parseInt(navigator.appVersion);
if (vers>=4) {
if (navigator.appName=="Netscape") {
document.jitterText.left+=w;
document.jitterText.top+=h;
}
else if (navigator.appName=="Microsoft Internet Explorer") {
document.all.jitterText.style.pixelLeft+=w;
document.all.jitterText.style.pixelTop+=h;
}
setTimeout("jitter()",100);
}
else {} // browser can't view effect
}
// End -->
</SCRIPT>
<STYLE TYPE="text/css">
#jitterText {
position: absolute; left: 0; top: 300; font-size:24pt;
background:white; color:red; }
</STYLE>
</HEAD>
<BODY OnLoad="jitter()">
<DIV ID="jitterText">
<center> This text jiggles more than gelatin !! </center>
</DIV>
<p><center>
</center><p>
