thank's bro teguh....
n'
nih kode mootols buat Random CSS

[b]credits[/b]: [url]http://tempek.net78.net[/url]
[spoiler]/**
* Random CSS Layout Changer
* Copyright (c)
http://tempek.net78.net
**/
/*global RANDOMCSS*/
(function () {
RANDOMCSS = {
count: [b]20[/b],
layout: [],
init: function () {
var preload = [],
x = 0;
while (x < RANDOMCSS.layout.length) {
preload[x] = [];
preload[x].href = RANDOMCSS.layout[x];
x += 1;
}
RANDOMCSS.layout = [
"CSS LAYOUT 1",
"CSS LAYOUT 2",
"CSS LAYOUT 3",
"CSS LAYOUT 4",
"CSS LAYOUT 5"
];
/*global objHead, objCSS, csslink, document*/
csslink = RANDOMCSS.layout;
objHead = document.getElementsByTagName("head");
if (objHead[0]) {
if (document.createElementNS && objHead[0].tagName === "head") {
objCSS = objHead[0].appendChild(document.createElementNS("http://www.w3.org/1999/xhtml", "link"));
} else {
objCSS = objHead[0].appendChild(document.createElement("link"));
objCSS.id = "randomlayout";
objCSS.rel = "stylesheet";
objCSS.href = csslink;
objCSS.type = "text/css";
}
}
RANDOMCSS.rotateCSS("randomlayout");
},
generate: function (layoutlen) {
var range = layoutlen + 1;
return Math.floor(Math.random() * range);
},
nextCSS: function () {
var x;
if (1) {
x = RANDOMCSS.generate(RANDOMCSS.layout.length - 1);
} else {
x = (x + 1) % RANDOMCSS.layout.length;
}
return RANDOMCSS.layout[x];
},
rotateCSS: function (temp) {
/*global window*/
var interval = RANDOMCSS.count * 1000;
document.getElementById(temp).href = RANDOMCSS.nextCSS();
window.setTimeout("RANDOMCSS.rotateCSS('" + temp + "')", interval);
}
};
})();
RANDOMCSS.init();[/spoiler]
edit
yang di bold [b]20[/b] untuk durasinya