window.onerror = null;
//var topPos = 100;
//var topMargin = 260;
var topPos = -75 + 50;
var topMargin = -75;
var slideTime = 1200;
var ns6 = (!document.all && document.getElementById);
var ie4 = (document.all);
var ns4 = (document.layers);
function layerObject(id) {
if (ns6) {
this.obj = document.getElementById(id).style;
return this.obj;
}
else if(ie4) {
this.obj = document.all[id].style;
floatLayer.style.pixelTop = topMargin;
return this.obj;
}
else if(ns4) {
this.obj = document.layers[id];
return this.obj;
   }
}
function layerSetup() {
floatLyr = new layerObject('floatLayer');
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.topPos;

newTargetY += -170 - 150;

if( newTargetY < topMargin ){ newTargetY = 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;
topPos = (pageHeight - 352)*0.5 + 50;
layerSetup();
floatObject();
}
else  {
pageWidth = document.body.clientWidth;
pageHeight = document.body.clientHeight;
topPos = (pageHeight - 352)*0.5-20 + 50;
layerSetup();
floatObject();
   }
}