Cara Membuat Back to Top Melayang

Yah lama tak posting gara-gara pulsa IM2 habis, payah juga ah. Ini adalah postingan yang di request oleh Mas Qucluk, yaitu Cara Membuat Back to Top Melayang. Caranya mudah kok Mas Qucluk tinggal kita menambah di Widget blog kita tanpa harus mengutak-atik di dalam Edit HTML. Berikut adalah caranya :

1. Login ke Blogger
   
   
2. Masuk Tata Letak --> Tambah Widget --> HTML/Javascript
   
   
3. Masukkan kode di bawah ini ke dalam HTML/Javascript
   
   

   <script type="text/JavaScript">
   var topMargin = 300
   var slideTime = 1200
   var ns6 = (!document.all && document.getElementById);
   var ie4 = (document.all);
   var ns4 = (document.layers);
   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.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 )floatLayer.style.pixelTop = newY
   if ( ns4 )document.floatLayer.top = newY
   if ( ns6 )document.getElementById('floatLayer').style.top = newY + "px"
   }
   }
   //-->
   </script>
   <div id="floatLayer" style="position: absolute; height:20px; width:15; left:650px; top:400px; z-index: 100"><a href="#"><img vspace="0" border="0" hspace="0" alt="Back to Top" width="15" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUbWq6EjQHT2U5Wt154bGXBkmBGKYnAJCSAI9K72OjCwnaAFU19UAFqd41D-Fu8LjyPKSm4S-bytAs2y7nEe-ClyepZaycIVa3e-FNcr7rdCfWyid9cnIW9BqrElCMvB0I7-YEX829_ebU/s320/up_out.gif" height="25"/></a></div>
   
   
   <a name="top"></a>

4.  Klik Simpan, dan lihat hasilnya. Selamat mencoba . . .  :D