// This script is copyright (c) Henrik Petersen, NetKontoret
// Feel free to use this script on your own pages as long as you do not change it.
// It is illegal to distribute the script as part of a tutorial / script archive.
// Updated version available at: http://www.echoecho.com/toolfloatinglayer.htm
// This comment and the 4 lines above may not be removed from the code.

NS6=false;
IE4=(document.all);
if (!IE4) {NS6=(document.getElementById);}
NS4=(document.layers);

function adjust() {
	if ((NS4) || (NS6)) {
		if (lastX==-1 || delayspeed==0){
			lastX=window.pageXOffset + floatX;
			lastY=window.pageYOffset + floatY;
		}
		else {
			var dx=Math.abs(window.pageXOffset+floatX-lastX);
			var dy=Math.abs(window.pageYOffset+floatY-lastY);
			var d=Math.sqrt(dx*dx+dy*dy);
			var c=Math.round(d/10);
			if (window.pageXOffset+floatX>lastX) {lastX=lastX+delayspeed+c;}
			if (window.pageXOffset+floatX<lastX) {lastX=lastX-delayspeed-c;}
			if (window.pageYOffset+floatY>lastY) {lastY=lastY+delayspeed+c;}
			if (window.pageYOffset+floatY<lastY) {lastY=lastY-delayspeed-c;}
		}
		if (NS4){
			document.layers['floatlayer'].pageX = lastX;
			document.layers['floatlayer'].pageY = lastY;
		}
		if (NS6){
			document.getElementById('floatlayer').style.left=lastX;
			document.getElementById('floatlayer').style.top=lastY;
		}
	}
	else if (IE4) {
		if (lastX==-1 || delayspeed==0)	{
			lastX=document.body.scrollLeft + floatX;
			lastY=document.body.scrollTop + floatY;
		}
		else {
			var dx=Math.abs(document.body.scrollLeft+floatX-lastX);
			var dy=Math.abs(document.body.scrollTop+floatY-lastY);
			var d=Math.sqrt(dx*dx+dy*dy);
			var c=Math.round(d/10);
			if (document.body.scrollLeft+floatX>lastX) {lastX=lastX+delayspeed+c;}
			if (document.body.scrollLeft+floatX<lastX) {lastX=lastX-delayspeed-c;}
			if (document.body.scrollTop+floatY>lastY) {lastY=lastY+delayspeed+c;}
			if (document.body.scrollTop+floatY<lastY) {lastY=lastY-delayspeed-c;}
		}
		document.all['floatlayer'].style.posLeft = lastX;
		document.all['floatlayer'].style.posTop = lastY;
	} 
	setTimeout('adjust()',50);
}

function define()	{
	if ((NS4) || (NS6)) { 
		if (halign=="left") {floatX=ifloatX};
		if (halign=="right") {floatX=window.innerWidth-ifloatX-layerwidth-20};
		if (halign=="center") {floatX=Math.round((window.innerWidth-20)/2)-Math.round(layerwidth/2)};
		if (valign=="top") {floatY=ifloatY};
		if (valign=="bottom") {floatY=window.innerHeight-ifloatY-layerheight};
		if (valign=="center") {floatY=Math.round((window.innerHeight-20)/2)-Math.round(layerheight/2)};
	}
	if (IE4) {
		if (halign=="left") {floatX=ifloatX};
		if (halign=="right") {floatX=document.body.offsetWidth-ifloatX-layerwidth-20}
		if (halign=="center") {floatX=Math.round((document.body.offsetWidth-20)/2)-Math.round(layerwidth/2)}
		if (valign=="top") {floatY=ifloatY};
		if (valign=="bottom") {floatY=document.body.offsetHeight-ifloatY-layerheight}
		if (valign=="center") {floatY=Math.round((document.body.offsetHeight-20)/2)-Math.round(layerheight/2)}
	}
}