var isCSS = (document.getElementById) ? 1 : 0;
var isIE4 = (document.all) ? 1 : 0;
var isNN4 = (document.layers) ? 1 : 0;

function hasClass(obj) {
	var result = false;
	if (obj.getAttributeNode("class") != null) {result = obj.getAttributeNode("class").value;}
	return result;
}

function stripe(id) {
	var even = false;
	var evenColor = arguments[1] ? arguments[1] : "#fff";
	var oddColor = arguments[2] ? arguments[2] : "#eee";
	var table = document.getElementById(id);
	if (! table) {return;}
	var tbodies = table.getElementsByTagName("tbody");
	for (var h = 0;h < tbodies.length;h++) {
		var trs = tbodies[h].getElementsByTagName("tr");
		for (var i = 0;i < trs.length;i++) {
			if (!hasClass(trs[i]) && !trs[i].style.backgroundColor) {
				var tds = trs[i].getElementsByTagName("td");
				for (var j = 0;j < tds.length;j++) {
					var mytd = tds[j];
					if (! hasClass(mytd) && !mytd.style.backgroundColor) {
						mytd.style.backgroundColor = even ? evenColor : oddColor;
					}
				}
			}
		even = !even;
		}
	}
}

function hideLayer(layer) {
	if (isCSS)
		layer.style.visibility = 'hidden';
	else if (isIE4)
		layer.style.visibility = 'hidden';
	else if (isNN4)
		layer.visibility = 'hide';
	return -1;
}

function showLayer(layer) {
	if (isCSS)
		layer.style.visibility = 'visible';
	else if (isIE4)
		layer.style.visibility = 'visible';
	else if (isNN4)
		layer.visibility = 'show';
	return -1;
}

function inheritLayer(layer) {
	if (isCSS)
		layer.style.visibility = 'inherit';
	else if (isIE4)
		layer.style.visibility = 'inherit';
	else if (isNN4)
		layer.visibility = 'inherit';
	return -1;
}

function getVisibility(layer) {
	if (isCSS)
		return layer.style.visibility;
	else if (isIE4)
		return layer.style.visibility;
	else if (isNN4) {
		if (layer.visibility == 'show')
			return 'visible';
		if (layer.visibility == 'hide')
			return 'hidden';
		return layer.visibility;
	}
	return -1;
}

function moveLayerTo(layer, x, y) {
	if (isCSS) {
		layer.style.left = x + 'px';
		layer.style.top = y + 'px';
	}
	else if (isIE4) {
		layer.style.left = x + 'px';
		layer.style.top = y + 'px';
	}
	else if (isNN4)
		layer.moveTo(x, y);
	return -1;
}

function moveLayerBy(layer, dx, dy) {
	if (isNN4)
		layer.moveBy(dx, dy);
	else {
		layer.style.pixelLeft += dx;
		layer.style.pixelTop += dy;
	}
}

function getLeft(layer) {
	if (isNN4)
		return layer.left;
	else
		return layer.style.pixelLeft;
	return -1;
}

function getTop(layer) {
	if (isNN4)
		return layer.top;
	else
		return layer.style.pixelTop;
	return -1;
}

function getRight(layer) {
	if (isNN4)
		return layer.left + getWidth(layer);
	else
		return layer.style.pixelLeft + getWidth(layer);
	return -1;
}

function getBottom(layer) {
	if (isNN4)
		return layer.top + getHeight(layer);
	else
		return layer.style.pixelTop + getHeight(layer);
	return -1;
}

function getPageLeft(layer) {
	var x;
	if (isNN4)
		return layer.pageX;
	else {
		x = 0;
		while (layer.offsetParent != null) {
			x += layer.offsetLeft;
			layer = layer.offsetParent;
		}
		x += layer.offsetLeft;
		return x;
	}
	return -1;
}

function getPageTop(layer) {
	var y;
	if (isNN4)
		return layer.pageY;
	else {
		y = 0;
		while (layer.offsetParent != null) {
			y += layer.offsetTop;
			layer = layer.offsetParent;
		}
		y += layer.offsetTop;
		return y;
	}
	return -1;
}

function getWidth(layer) {
	if (isNN4) {
		if (layer.document.width)
			return layer.document.width;
		else
			return layer.clip.right - layer.clip.left;
	}
	else {
		if (layer.style.pixelWidth)
			return layer.style.pixelWidth;
		else
			return layer.clientWidth;
	}
	return -1;
}

function getHeight(layer) {
	if (isNN4) {
		if (layer.document.height)
			return layer.document.height;
		else
			return layer.clip.bottom - layer.clip.top;
	}
	else {
		if (layer.style.pixelHeight)
			return layer.style.pixelHeight;
		else
			return layer.clientHeight;
	}
	return -1;
}

function getzIndex(layer) {
	if (isNN4)
		return layer.zIndex;
	else
		return layer.style.zIndex;

	return -1;
}

function setzIndex(layer, z) {
	if (isNN4)
		layer.zIndex = z;
	else
		layer.style.zIndex = z;
}

function clipLayer(layer, clipleft, cliptop, clipright, clipbottom) {
	if (isNN4) {
		layer.clip.left   = clipleft;
		layer.clip.top    = cliptop;
		layer.clip.right  = clipright;
		layer.clip.bottom = clipbottom;
	}
	else
		layer.style.clip = 'rect(' + cliptop + ' ' +	clipright + ' ' + clipbottom + ' ' + clipleft +')';
}

function getClipLeft(layer) {
	if (isNN4)
		return layer.clip.left;
	else {
		var str = layer.style.clip;
		if (!str)
			return 0;
		var clip = getIEClipValues(layer.style.clip);
		return(clip[3]);
	}
	return -1;
}

function getClipTop(layer) {
	if (isNN4)
		return layer.clip.top;
	else {
		var str = layer.style.clip;
		if (!str)
			return 0;
		var clip = getIEClipValues(layer.style.clip);
		return clip[0];
	}
	return -1;
}

function getClipRight(layer) {
	if (isNN4)
		return layer.clip.right;
	else {
		var str = layer.style.clip;
		if (!str)
			return layer.style.pixelWidth;
		var clip = getIEClipValues(layer.style.clip);
		return clip[1];
	}
	return -1;
}

function getClipBottom(layer) {
	if (isNN4)
		return layer.clip.bottom;
	else {
		var str = layer.style.clip;
		if (!str)
			return layer.style.pixelHeight;
		var clip = getIEClipValues(layer.style.clip);
		return clip[2];
	}
	return -1;
}

function getClipWidth(layer) {
	if (isNN4)
		return layer.clip.width;
	else {
		var str = layer.style.clip;
		if (!str)
			return layer.style.pixelWidth;
		var clip = getIEClipValues(layer.style.clip);
		return clip[1] - clip[3];
	}
	return -1;
}

function getClipHeight(layer) {
	if (isNN4)
		return layer.clip.height;
	else {
		var str = layer.style.clip;
		if (!str)
			return layer.style.pixelHeight;
		var clip = getIEClipValues(layer.style.clip);
		return clip[2] - clip[0];
	}
	return -1;
}

function getIEClipValues(str) {
	var clip = new Array();
	var i;
	i = str.indexOf('(');
	clip[0] = parseInt(str.substring(i + 1, str.length), 10);
	i = str.indexOf(' ', i + 1);
	clip[1] = parseInt(str.substring(i + 1, str.length), 10);
	i = str.indexOf(' ', i + 1);
	clip[2] = parseInt(str.substring(i + 1, str.length), 10);
	i = str.indexOf(' ', i + 1);
	clip[3] = parseInt(str.substring(i + 1, str.length), 10);
	return clip;
}

function scrollLayerTo(layer, x, y, bound) {
	var dx = getClipLeft(layer) - x;
	var dy = getClipTop(layer) - y;
	scrollLayerBy(layer, -dx, -dy, bound);
}

function scrollLayerBy(layer, dx, dy, bound) {
	var cl = getClipLeft(layer);
	var ct = getClipTop(layer);
	var cr = getClipRight(layer);
	var cb = getClipBottom(layer);
	if (bound) {
		if (cl + dx < 0)
			dx = -cl;
		else if (cr + dx > getWidth(layer))
			dx = getWidth(layer) - cr;
		if (ct + dy < 0)
			dy = -ct;
		else if (cb + dy > getHeight(layer))
			dy = getHeight(layer) - cb;
	}
	clipLayer(layer, cl + dx, ct + dy, cr + dx, cb + dy);
	moveLayerBy(layer, -dx, -dy);
}

function setBgColor(layer, color) {
	if (isNN4)
		layer.bgColor = color;
	else
		layer.style.backgroundColor = color;
}

function setBgImage(layer, src) {
	if (isNN4)
		layer.background.src = src;
	else
		layer.style.backgroundImage = 'url(' + src + ')';
}

function getLayer(name) {
	if (isCSS)
		return document.getElementById(name);
	else if (isIE4)
		return eval('document.all.' + name);
	else if (isNN4)
		return findLayer(name, document);
	return null;
}

function findLayer(name, doc) {
	var i, layer;
	for (i = 0; i < doc.layers.length; i++) {
		layer = doc.layers[i];
		if (layer.name == name)
			return layer;
		if (layer.document.layers.length > 0)
			if ((layer = findLayer(name, layer.document)) != null)
				return layer;
	}
	return null;
}

function getImage(name) {
	if (isNN4)
		return findImage(name, document);
	else if (isCSS)
		return document.getElementsByName(name)[0];
	else
		return eval('document.all.' + name);
	return null;
}

function findImage(name, doc) {
	var i, img;
	for (i = 0; i < doc.images.length; i++)
		if (doc.images[i].name == name)
			return doc.images[i];
	for (i = 0; i < doc.layers.length; i++)
		if ((img = findImage(name, doc.layers[i].document)) != null) {
			img.container = doc.layers[i];
			return img;
		}
	return null;
}

function getImagePageLeft(img) {
	var x, obj;
	if (isNN4) {
		if (img.container != null)
			return img.container.pageX + img.x;
		else
			return img.x;
	}
	else {
		x = 0;
		obj = img;
		while (obj.offsetParent != null) {
			x += obj.offsetLeft;
			obj = obj.offsetParent;
		}
		x += obj.offsetLeft;
		return x;
	}
	return -1;
}

function getImagePageTop(img) {
	var y, obj;
	if (isNN4) {
		if (img.container != null)
			return img.container.pageY + img.y;
		else
			return img.y;
	}
	else {
		y = 0;
		obj = img;
		while (obj.offsetParent != null) {
			y += obj.offsetTop;
			obj = obj.offsetParent;
		}
		y += obj.offsetTop;
		return y;
	}
	return -1;
}

function getWindowWidth() {
	if (isNN4)
		return window.innerWidth;
	else
		return document.body.clientWidth;
	return -1;
}

function getWindowHeight() {
	if (isNN4)
		return window.innerHeight;
	else
		return document.body.clientHeight;
	return -1;
}

function getPageWidth() {
	if (isNN4)
		return document.width;
	else
		return document.body.scrollWidth;
	return -1;
}

function getPageHeight() {
	if (isNN4)
		return document.height;
	else
		return document.body.scrollHeight;
	return -1;
}

function getPageScrollX() {
	if (isNN4)
		return window.pageXOffset;
	else
		return document.body.scrollLeft;
	return -1;
}

function getPageScrollY() {
	if (isNN4)
		return window.pageYOffset;
	else
		return document.body.scrollTop;
	return -1;
}