var topMargin  = 0 
 var slideTime = 400
 var ns6 = (!document.all && document.getElementById); 
 var ie4 = (document.all);
 var ns4 = (document.layers);
 var ie6 = (document.documentElement);

function initSlider (){
 window.setInterval("main()", 10);
}

function floatObject() { 
 findHt =	(ns6||ns4) ? innerHeight : document.body.clientHeight;
} 
	
function main() { 
	var top = (window.pageYOffset)?(window.pageYOffset):(document.documentElement)?document.documentElement.scrollTop:document.body.scrollTop; 
	if (ns4) { 
	 this.currentY 	= document.floatLayer.top; 
	 this.scrollTop	= top;
	 mainTrigger();
	 } else if(ns6) {
		 this.currentY = parseInt(document.getElementById('floatLayer').style.top); 
		 this.scrollTop = top;
		 mainTrigger(); 
	 } else if(ie4) { 
		 this.currentY 	= floatLayer.style.pixelTop;
		 this.scrollTop	= top; 
		 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" 
  } 
}