Текст плавно появляется и исчезает

var x = 0;
var y = 0;
var themessage, size;
var esize = "</font>";

function initArray() {
this.length = initArray.arguments.length;
for (var i = 0; i < this.length; i++) {
this[i] = initArray.arguments[i];
}
}
var themessage2 = new initArray(
"webscripts.ucoz.ru",
"Сборник скриптов",
"Ваш текст",
"Ваш текст"
);
if(navigator.appName == "Netscape")
document.write('<layer id="wds"></layer><br>');
if (navigator.appVersion.indexOf("MSIE") != -1)
document.write('<span id="wds"></span><br>');
function upwords(){
themessage = themessage2[y];
if (x < maxsize) {
x++;
setTimeout("upwords()",speed);
}
else setTimeout("downwords()",cycledelay);

if(navigator.appName == "Netscape") {
size = "<font point-size='"+x+"pt'>";
document.wds.document.write(size+"<center>"+themessage+"</center>"+esize);
document.wds.document.close();
}
if (navigator.appVersion.indexOf("MSIE") != -1){
wds.innerHTML = "<center>"+themessage+"</center>";
wds.style.fontSize=x+'px'
}
}
function downwords(){
if (x > 1) {
x--;
setTimeout("downwords()",speed);
}
else {
setTimeout("upwords()",cycledelay);
y++;
if (y > themessage2.length - 1) y = 0;
}
if(navigator.appName == "Netscape") {
size = "<font point-size='"+x+"pt'>";
document.wds.document.write(size+"<center>"+themessage+"</center>"+esize);
document.wds.document.close();
}
if (navigator.appVersion.indexOf("MSIE") != -1){
wds.innerHTML = "<center>"+themessage+"</center>";
wds.style.fontSize=x+'px'
}
}
setTimeout("upwords()",speed);
// End -->
</script>