var dir = "./";

var images = new Array(
	dir+"antdl.gif",
	dir+"antdn.gif",
	dir+"antdr.gif",
	dir+"antlt.gif",
	dir+"antrt.gif",
	dir+"antul.gif",
	dir+"antup.gif",
	dir+"antur.gif"
	);

var isMinNS4 = (document.layers) ? 1 : 0;
var isMinIE4 = (document.all)    ? 1 : 0;

var _LBimgList;
var _LBimgCount;
var _LBbase = "LBbase";
var _LBlow  = "LBlow";
var _LBhigh = "LBhigh";
var _LBwidth;
var _LBheight;
var _LBbaseLayer;
var _LBlowLayer;
var _LBhighLayer;

function createLoadBar(width, height, bdSize, bdColor, bgColor, fgColor, fontFace, fontSize, text) {
	var txtLow, txtHigh, tblStart, tblEnd;
	var str;
	txtLow  = '<font color="' + fgColor + '" face="' + fontFace + '" size=' + fontSize + '>' + text + '</font>';
	txtHigh = '<font color="' + bgColor  + '" face="' + fontFace + '" size=' + fontSize + '>' + text + '</font>';
	tblStart = '<table border=0 cellpadding=0 cellspacing=0 height=100% width=100%><tr valign="center"><td align="center">';
	tblEnd = '</td></tr></table>';
	if (isMinNS4)
	str = '<layer name="' + _LBbase + '" bgcolor="' + bdColor + '" width=' + width + ' height=' + height + ' visibility="hide">\n'
	+ '  <layer name="' + _LBlow  + '" bgcolor="' + bgColor + '" left=' + bdSize + ' top=' + bdSize + ' width=' + (width - 2 * bdSize) + ' height=' + (height - 2 * bdSize) + '>' + tblStart + txtLow + tblEnd + '</layer>\n'
	+ '  <layer name="' + _LBhigh + '" bgcolor="' + fgColor + '" left=' + bdSize + ' top=' + bdSize + ' width=' + (width - 2 * bdSize) + ' height=' + (height - 2 * bdSize) + '>' + tblStart + txtHigh + tblEnd + '</layer>\n'
	+ '</layer>';
	if (isMinIE4)
	str = '<div id="' + _LBbase + '" style="position:absolute; background-color:' + bdColor + '; width:' + width + 'px; height:' + height + 'px; visibility:hidden;">\n'
	+ '  <div id="' + _LBlow  + '" style="position:absolute; background-color=' + bgColor + '; left:' + bdSize + 'px; top:' + bdSize + 'px; width:' + (width - 2 * bdSize) + 'px; height:' + (height - 2 * bdSize) + 'px;">' + tblStart + txtLow + tblEnd + '</div>\n'
	+ '  <div id="' + _LBhigh  + '" style="position:absolute; background-color=' + fgColor + '; left:' + bdSize + 'px; top:' + bdSize + 'px; width:' + (width - 2 * bdSize) + 'px; height:' + (height - 2 * bdSize) + 'px;">' + tblStart + txtHigh + tblEnd + '</div>\n'
	+ '</div>';
	document.writeln(str);
	_LBwidth = width - 2 * bdSize;
	_LBheight = height - 2 * bdSize;
}

function startLoadBar(srcList, x, y) {
	var i, w, h;

	if (isMinNS4) {
		_LBbaseLayer = document.layers[_LBbase];
		_LBlowLayer  = _LBbaseLayer.document.layers[_LBlow];
		_LBhighLayer = _LBbaseLayer.document.layers[_LBhigh];
	}

	if (isMinIE4) {
		_LBbaseLayer = eval('document.all.' + _LBbase);
		_LBlowLayer  = eval('document.all.' + _LBlow);
		_LBhighLayer = eval('document.all.' + _LBhigh);
	}
	if (isMinNS4) {
		w = window.innerWidth;
		h = window.innerHeight;
	}
	if (isMinIE4) {
		w = document.body.clientWidth;
		h = document.body.clientHeight;
	}
	if (x == null)
		x = Math.round((w  - _LBwidth)  / 2);
	if (y == null)
		y = Math.round((h - _LBheight) / 2);
	moveLayerTo(_LBbaseLayer, x, y);
	clipLayer(_LBhighLayer, 0, 0, 0, _LBheight);
	showLayer(_LBbaseLayer);
	_LBimgCount = 0;
	_LBimgList = new Array();
	for (i = 0; i < srcList.length; i++) {
		_LBimgList[i] = new Image();
		_LBimgList[i].onabort = _LBupdate;
		_LBimgList[i].onerror = _LBupdate;
		_LBimgList[i].onload  = _LBupdate;
	}
	for (i = 0; i < srcList.length; i++)
		_LBimgList[i].src = srcList[i];
}

function endLoadBar() { // empty (can be changed) function called when finished
}

function _LBupdate() {
	var pct;
	_LBimgCount++;
	pct = _LBimgCount / _LBimgList.length;
	clipLayer(_LBhighLayer, 0, 0, Math.round(pct * _LBwidth), _LBheight);
	if (_LBimgCount == _LBimgList.length) {
		setTimeout('hideLayer(_LBbaseLayer)', 500);
		endLoadBar();
	}
}

function moveLayerTo(layer, x, y) {
	if (isMinNS4)
		layer.moveTo(x, y);
	if (isMinIE4) {
		layer.style.left = x;
		layer.style.top  = y;
	}
}

function hideLayer(layer) {
	if (isMinNS4)
		layer.visibility = "hide";
	if (isMinIE4)
		layer.style.visibility = "hidden";
}

function getWindowWidth() {
	if (isMinNS4)
		return(window.innerWidth);
	if (isMinIE4)
		return(document.body.offsetWidth);
	return(-1);
}

function getWindowHeight() {
	if (isMinNS4)
		return(window.innerHeight);
	if (isMinIE4)
		return(document.body.offsetHeight);
	return(-1);
}

function getPageScrollX() {
	if (isMinNS4)
		return(window.pageXOffset);
	if (isMinIE4)
		return(document.body.scrollLeft);
	return(-1);
}

function getPageScrollY() {
	if (isMinNS4)
		return(window.pageYOffset);
	if (isMinIE4)
		return(document.body.scrollTop);
	return(-1);
}

function getHeight(layer) {
	if (isMinNS4) {
		if (layer.document.height)
			return(layer.document.height);
		else
			return(layer.clip.bottom - layer.clip.top);
	}
	if (isMinIE4) {
		if (false && layer.style.pixelHeight)
			return(layer.style.pixelHeight);
		else
			return(layer.clientHeight);
	}
	return(-1);
}

function getWidth(layer) {
	if (isMinNS4) {
		if (layer.document.width)
			return(layer.document.width);
		else
			return(layer.clip.right - layer.clip.left);
	}
	if (isMinIE4) {
		if (layer.style.pixelWidth)
			return(layer.style.pixelWidth);
		else
			return(layer.clientWidth);
	}
	return(-1);
}

function getLeft(layer) {
	if (isMinNS4)
		return(layer.left);
	if (isMinIE4)
		return(layer.style.pixelLeft);
	return(-1);
}

function getTop(layer) {
	if (isMinNS4)
		return(layer.top);
	if (isMinIE4)
		return(layer.style.pixelTop);
	return(-1);
}

function getRight(layer) {
	if (isMinNS4)
		return(layer.left + getWidth(layer));
	if (isMinIE4)
		return(layer.style.pixelLeft + getWidth(layer));
	return(-1);
}

function getBottom(layer) {
	if (isMinNS4)
		return(layer.top + getHeight(layer));
	else if (isMinIE4)
		return(layer.style.pixelTop + getHeight(layer));
	return(-1);
}

function moveLayerBy(layer, dx, dy) {
	if (isMinNS4)
		layer.moveBy(dx, dy);
	if (isMinIE4) {
		layer.style.pixelLeft += dx;
		layer.style.pixelTop+= dy;
	}
}

function showLayer(layer) {
	if (isMinNS4)
		layer.visibility = "show";
	if (isMinIE4)
		layer.style.visibility = "visible";
}

function clipLayer(layer, clipleft, cliptop, clipright, clipbottom) {
	if (isMinNS4) {
		layer.clip.left = clipleft;
		layer.clip.top= cliptop;
		layer.clip.right= clipright;
		layer.clip.bottom = clipbottom;
	}
	if (isMinIE4)
		layer.style.clip = 'rect(' + cliptop + ' ' +clipright + ' ' + clipbottom + ' ' + clipleft +')';
}

var mouseX = 0;
var mouseY = 0;
if (isMinNS4)
	document.captureEvents(Event.MOUSEMOVE);
document.onmousemove = getMousePosition;

function init() {
	startLoadBar(images);
}

function getMousePosition(e) {
	if (isMinNS4) {
		mouseX = e.pageX;
		mouseY = e.pageY;
	}
	if (isMinIE4) {
		mouseX = event.clientX + document.body.scrollLeft;
		mouseY = event.clientY + document.body.scrollTop;
	}
	return true;
}

var ants = new Array(8);

function endLoadBar() {
	var i;
	for (i = 0; i < ants.length; i++) {
		if (isMinNS4) {
			ants[i] = document.layers["ant" + (i + 1)];
			ants[i].image = ants[i].document.images["antimg" + (i + 1)];
		}
		if (isMinIE4) {
			ants[i] = eval('document.all.ant' + (i + 1));
			ants[i].image = document.images["antimg" + (i + 1)];
		}
		initAnt(i);
		showLayer(ants[i]);
	}
	updateAnts();
}

function initAnt(n) {
	var s, x, y;
	x = Math.floor(Math.random() * getWindowWidth());
	y = Math.floor(Math.random() * getWindowHeight());
	s = Math.floor(Math.random() * 4);
	if (s == 0)
		x = -getWidth(ants[n]);
	if (s == 1)
		x = getWindowWidth();
	if (s == 2)
		y = -getHeight(ants[n]);
	if (s == 3)
		y = getWindowHeight();
	x += getPageScrollX();
	y += getPageScrollY();
	moveLayerTo(ants[n], x, y);
}

function updateAnts() {
	var i, dx, dy, theta, d;
	d = 3;

	for (i = 0; i < ants.length; i++) {

		dx = mouseX - getLeft(ants[i]);
		dy = mouseY - getTop(ants[i]);
		theta = Math.round(Math.atan2(-dy, dx) * 180 / Math.PI);

		if (theta < 0)
			theta += 360;
		if (Math.abs(dx) < d && Math.abs(dy) < d)
			initAnt(i);
		else if (theta > 22.5 && theta <= 67.5) {
			moveLayerBy(ants[i], d, -d);
			ants[i].image.src = dir+"antur.gif";
		}
		else if (theta > 67.5 && theta <= 112.5) {
			moveLayerBy(ants[i], 0, -d);
			ants[i].image.src = dir+"antup.gif";
		}
		else if (theta > 112.5 && theta <= 157.5) {
			moveLayerBy(ants[i], -d, -d);
			ants[i].image.src = dir+"antul.gif";
		}
		else if (theta > 157.5 && theta <= 202.5) {
			moveLayerBy(ants[i], -d, 0);
			ants[i].image.src = dir+"antlt.gif";
		}
		else if (theta > 202.5 && theta <= 247.5) {
			moveLayerBy(ants[i], -d, d);
			ants[i].image.src = dir+"antdl.gif";
		}
		else if (theta > 247.5 && theta <= 292.5) {
			moveLayerBy(ants[i], 0, d);
			ants[i].image.src = dir+"antdn.gif";
		}
		else if (theta > 292.5 && theta <= 337.5) {
			moveLayerBy(ants[i], d, d);
			ants[i].image.src = dir+"antdr.gif";
		}
		else {
			moveLayerBy(ants[i], d, 0);
			ants[i].image.src = dir+"antrt.gif";
		}
	}
	setTimeout('updateAnts()', 50);
	return;
}