Đặt code này vào tag HEAD :

<style type="text/css">
.menulinks {position:relative;}
#menucont a{color:#006699; font-weight:bold; text-decoration:none;}
#menucont a:hover{color:#ff0000; font-weight:bold; text-decoration:underline overline; text-transform: uppercase;}
</style>

<SCRIPT LANGUAGE="JavaScript">
nSpace=5 // how many space maximum between each letter
nSpeed=100 // the speed of the animation
timerLSM=null;
function LetterSpacingMenu() {
if(document.getElementById){
lnks = Math.floor(Math.random()*lnk.length);
letterSpacing = Math.floor(Math.random()*nSpace);
lnk[lnks].style.letterSpacing = letterSpacing + "px";
timerLSM = setTimeout("LetterSpacingMenu()", nSpeed);
}
}
function StopMenu() {
if(document.getElementById) {
clearTimeout(timerLSM);
for(i=0;i<lnk.length;i++)
lnk[i].style.letterSpacing = 0 + "px";
}
}
function LSMenuInit() {
if(document.getElementById) {
lnk = document.getElementById("menucont").getElementsByTagName("a");
cnt = document.getElementById("menucont");
cnt.style.textAlign= "center";
cnt.onmouseover=StopMenu;
cnt.onmouseout=LetterSpacingMenu;
LetterSpacingMenu();
}
}
onload=LSMenuInit;

<!-- Begin

// End -->
</script>

Đặt code này vào tag BODY :

<div id="menucont">
<!-- Put all links between <center> </center> to get those links align center for older browser -->
<a href="#" id="a1" class="menulinks">what's new</a><br>
<a href="#" id="a2" class="menulinks">about this site</a><br>
<a href="#" id="a3" class="menulinks">scripts</a><br>
<a href="#" id="a4" class="menulinks">applets</a><br>
<a href="#" id="a5" class="menulinks">links</a><br>
<a href="#" id="a6" class="menulinks">recommend this site</a><br>
<a href="#" id="a7" class="menulinks">contact us</a>
</div>

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