var blnBorder = false;
var webpath = "http://www.brethouwer.info/";
//var strHref = window.location.href;
//var darkrowBg ="url(images/bgdarkrow.jpg)";

//if ( strHref.indexOf("jeugdhonk") > -1 ){
//	darkrowBg = "url(../images/bgdarkrow.jpg)";
//}


a1a = new Image;
a1a.src= webpath + "images/leftcurve_mo.gif";
a2a = new Image;
a2a.src= webpath + "images/leftcurve.gif";

function setBorder(id,bOn) {
	var oTab    = document.all.item(id+"Tab");
	var oTab1   = document.all.item(id+"Tab1");
	var oTab2   = document.all.item(id+"Tab2");
	var oBorder = document.all.item(id+"Content");

	if (!oTab || !oTab1 || !oTab2 || !oBorder) 
	return;

	if (bOn)
	{
		oBorder.style.borderColor = "#CC9900";
		oBorder.style.background = "url(http://www.brethouwer.info/images/bgdarkrow.jpg)";
		oTab.bgColor = "#996600";
		oTab1.src    = webpath + "images/leftcurve_mo.gif";
		oTab2.color  = "#FFFFFF";
	}
	else
	{
		oBorder.style.borderColor = blnBorder? "#CC9900" : "#FFE7B0";
		oBorder.style.background = "";
		oTab.bgColor = "#FFCC99";
		oTab1.src    = webpath + "images/leftcurve.gif";
		oTab2.color  = "#663300";
	}
}

function setBorder2(id,bOn) {
	var oTab    = document.all.item(id);

	if (!oTab) 
	return;

	if (bOn)
	{
		oTab.style.borderColor = "#FFCC99";
	}
	else
	{
		oTab.style.borderColor = blnBorder? "#ff6600" : "#FFE7B0"; //"#FFE7B0"
	}
}

window.onerror = null;
var leftmargin = 6;
var topMargin = 16;
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 && document.all[id]) {
		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', 9);
	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 && document.all("floatLayer") != null) {
		this.currentY = document.all("floatLayer").style.pixelTop;
		this.scrollTop = document.body.scrollTop;
		mainTrigger();
   }
}

function mainTrigger() {
	var newTargetY =  this.topMargin + 100;	// this.scrollTop +
	if (this.scrollTop>45) {
		if (this.scrollTop<65) {
			newTargetY = this.scrollTop + this.topMargin + 80;
		}
		else {
			newTargetY = this.scrollTop + this.topMargin + 30;			
		} 
	}

	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();
   }
}