window.onerror = null;
var topMargin = 100;
var slideTime = 1200;
var ns6 = (!document.all && document.getElementById);
var ie4 = (document.all);
var ns4 = (document.layers);
function layerObject(id,left) {
if (ns6) {
this.obj = document.getElementById(id).style;
this.obj.left = left;
return this.obj;
}
else if(ie4) {
this.obj = document.all[id].style;
this.obj.left = left;
return this.obj;
}
else if(ns4) {
this.obj = document.layers[id];
this.obj.left = left;
return this.obj;
}
}
function layerSetup() {
floatLyr = new layerObject(‘floatLayer’, pageWidth * .5);
window.setInterval(“main()”, 10)
}
function floatObject() {
if (ns4 || ns6) {
findHt = window.innerHeight;
} else if(ie4) {
findHt = document.body.clientHeight;
}
}
function main() {
if (ns4) {
this.currentY = document.layers["floatLayer"].top;
this.scrollTop = window.pageYOffset;
mainTrigger();
}
else if(ns6) {
this.currentY = parseInt(document.getElementById(‘floatLayer’).style.top);
this.scrollTop = scrollY;
mainTrigger();
} else if(ie4) {
this.currentY = floatLayer.style.pixelTop;
this.scrollTop = document.body.scrollTop;
mainTrigger();
}
}
function mainTrigger() {
var newTargetY = this.scrollTop + this.topMargin;
if ( this.currentY != newTargetY ) {
if ( newTargetY != this.targetY ) {
this.targetY = newTargetY;
floatStart();
}
animator();
}
}
function floatStart() {
var now = new Date();
this.A = this.targetY – this.currentY;
this.B = Math.PI / ( 2 * this.slideTime );
this.C = now.getTime();
if (Math.abs(this.A) > this.findHt) {
this.D = this.A > 0 ? this.targetY – this.findHt : this.targetY + this.findHt;
this.A = this.A > 0 ? this.findHt : -this.findHt;
}
else {
this.D = this.currentY;
}
}
function animator() {
var now = new Date();
var newY = this.A * Math.sin( this.B * ( now.getTime() – this.C ) ) + this.D;
newY = Math.round(newY);
if (( this.A > 0 && newY > this.currentY ) || ( this.A < 0 && newY < this.currentY )) {
if ( ie4 )document.all.floatLayer.style.pixelTop = newY;
if ( ns4 )document.layers["floatLayer"].top = newY;
if ( ns6 )document.getElementById(‘floatLayer’).style.top = newY + “px”;
}
}
function start() {
if(ns6||ns4) {
pageWidth = innerWidth;
pageHeight = innerHeight;
layerSetup();
floatObject();
}
else if(ie4) {
pageWidth = document.body.clientWidth;
pageHeight = document.body.clientHeight;
layerSetup();
floatObject();
}
}
//
Atau bisa didownload di
sini Setelah itu tambahkan onload=”start()” ke tag bodi seperti di bawah ini
<body onLoad=”start()”>
dan untuk kode HTML nya sebagai berikut :
<div id=”floatLayer” style=”position: absolute; height: 200px; width: 389px; left: 405px; top: 10px;”>
This is a Floating Layer. Replace this content with your own.
</div>
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