//
// Description:	Dynamic HTML javascript module
// File:		dhtmlLib.js
// Author:		Guy Fernando (Copyright Informatix Ltd)
// Date:		13/12/2001
//

function writeIntoLayer(layer, str)
{
	if (isMinNS4)
	{
		layer.document.write(str);
		layer.document.close();
	}
	if (isMinIE4 || isMinNS6)
		layer.innerHTML = str;
}

function hideLayer(layer)
{
	if (isMinNS4)
		layer.visibility = "hide";
	if (isMinIE4 || isMinNS6)
		layer.style.visibility = "hidden";
}

function showLayer(layer)
{
	if (isMinNS4)
		layer.visibility = "show";
	if (isMinIE4 || isMinNS6)
		layer.style.visibility = "visible";
}

function isVisible(layer)
{
	if (isMinNS4 && layer.visibility == "show")
		return true;
	if ((isMinIE4 || isMinNS6) && layer.style.visibility == "visible")
		return true;

	return false;
}

function moveLayerTo(layer, x, y)
{
	x = parseInt(x);
	y = parseInt(y);

	if (isMinNS4)
		layer.moveTo(x, y);
	if (isMinIE4)
	{
		layer.style.pixelLeft = x;
		layer.style.pixelTop  = y;
	}
	if (isMinNS6)
	{
		layer.style.left = x;
		layer.style.top  = y;
	}
}

function moveLayerBy(layer, dx, dy)
{
	dx = parseInt(dx);
	dy = parseInt(dy);

	if (isMinNS4)
		layer.moveBy(dx, dy);
	if (isMinIE4)
	{
		layer.style.pixelLeft += dx;
		layer.style.pixelTop  += dy;
	}
	if (isMinNS6)
	{
		layer.style.left = parseInt(layer.style.left) + dx;
		layer.style.top  = parseInt(layer.style.top) + dy;
	}
}

function getLeft(layer)
{
	if (isMinNS4)
		return layer.left;
	if (isMinIE4)
		return layer.style.pixelLeft;
	if (isMinNS6)
	{
		if (layer.style.left)
			return parseInt(layer.style.left);
		else
			return parseInt(document.defaultView.getComputedStyle(layer, "").getPropertyValue("left"));
	}
	return -1;
}

function setLeft(layer, x)
{
	x = parseInt(x);

	if (isMinNS4)
		layer.left = x;
	if (isMinIE4)
		layer.style.pixelLeft = x;
	if (isMinNS6)
		layer.style.left = x;
	return -1;
}

function getTop(layer)
{
	if (isMinNS4)
		return layer.top;
	if (isMinIE4)
		return layer.style.pixelTop;
	if (isMinNS6)
	{
		if (layer.style.top)
			return parseInt(layer.style.top);
		else
			return parseInt(document.defaultView.getComputedStyle(layer, "").getPropertyValue("top"));
	}
	return -1;
}

function setTop(layer, y)
{
	y = parseInt(y);

	if (isMinNS4)
		layer.top = y;
	if (isMinIE4)
		layer.style.pixelTop = y;
	if (isMinNS6)
		layer.style.top = y;
	return -1;
}

function getRight(layer)
{
	if (isMinNS4 || isMinIE4 || isMinNS6)
		return getLeft(layer) + getWidth(layer);
	return -1;
}

function getBottom(layer)
{
	if (isMinNS4 || isMinIE4 || isMinNS6)
		return getTop(layer) + getHeight(layer);
	return -1;
}

function getPageLeft(layer)
{
	if (isMinNS4)
		return layer.pageX;
	if (isMinIE4 || isMinNS6)
		return layer.offsetLeft;
	return -1;
}

function getPageTop(layer)
{
	if (isMinNS4)
		return layer.pageY;
	if (isMinIE4 || isMinNS6)
		return layer.offsetTop;
	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;
	}
	if (isMinNS6)
	{
		if (layer.style.width)
			return parseInt(layer.style.width);
		else
			return parseInt(document.defaultView.getComputedStyle(layer, "").getPropertyValue("width"));
	}
		
	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;
	}
	if (isMinNS6)
	{
		if (layer.style.height)
			return parseInt(layer.style.height);
		else
			return parseInt(document.defaultView.getComputedStyle(layer, "").getPropertyValue("height"));
	}
		
	return -1;
}

function getzIndex(layer)
{
	if (isMinNS4)
		return layer.zIndex;
	if (isMinIE4 || isMinNS6)
		return parseInt(layer.style.zIndex);
	return -1;
}

function setzIndex(layer, z)
{
	z = parseInt(z);

	if (isMinNS4)
		layer.zIndex = z;
	if (isMinIE4 || isMinNS6)
		layer.style.zIndex = z;
}

function clipLayer(layer, clipleft, cliptop, clipright, clipbottom)
{
	clipleft   = parseInt(clipleft);
	cliptop    = parseInt(cliptop);
	clipright  = parseInt(clipright);
	clipbottom = parseInt(clipbottom);

	if (isMinNS4)
	{
		layer.clip.left   = clipleft;
		layer.clip.top    = cliptop;
		layer.clip.right  = clipright;
		layer.clip.bottom = clipbottom;
	}
	if (isMinIE4 || isMinNS6)
		layer.style.clip = 'rect(' + cliptop + ' ' +  clipright + ' ' + clipbottom + ' ' + clipleft +')';
}

function getClipLeft(layer)
{
	if (isMinNS4)
		return layer.clip.left;
	if (isMinIE4 || isMinNS6)
	{
		var str = layer.style.clip;
		if (!str)
			return 0;
		var clip = getClipValues(layer.style.clip);
		return clip[3];
	}
	return -1;
}

function getClipTop(layer)
{
	if (isMinNS4)
		return layer.clip.top;
	if (isMinIE4 || isMinNS6)
	{	
		var str = layer.style.clip;
		if (!str)
			return 0;
		var clip = getClipValues(layer.style.clip);
		return clip[0];
	}
	return -1;
}

function getClipRight(layer)
{
	if (isMinNS4)
		return layer.clip.right;
	if (isMinIE4 || isMinNS6)
	{
		var str = layer.style.clip;
		if (!str)
			return layer.style.pixelWidth;
		var clip = getClipValues(layer.style.clip);
		return clip[1];
	}
	return -1;
}

function getClipBottom(layer)
{
	if (isMinNS4)
		return layer.clip.bottom;
	if (isMinIE4 || isMinNS6)
	{
		var str = layer.style.clip;
		if (!str)
			return layer.style.pixelHeight;
		var clip = getClipValues(layer.style.clip);
		return clip[2];
	}
	return -1;
}

function getClipWidth(layer)
{
	if (isMinNS4)
		return layer.clip.width;
	if (isMinIE4 || isMinNS6)
	{
		var str = layer.style.clip;
		if (!str)
			return layer.style.pixelWidth;
		var clip = getClipValues(str);
		return clip[1] - clip[3];
	}
	return -1;
}

function getClipHeight(layer)
{
	if (isMinNS4)
		return layer.clip.height;
	if (isMinIE4 || isMinNS6)
	{
		var str = layer.style.clip;
		if (!str)
			return layer.style.pixelHeight;
		var clip = getClipValues(str);
		return clip[2] - clip[0];
	}
	return -1;
}

function getClipValues(str)
{
	var clip = new Array();
	var i;

	// Parse out the clipping values for IE layers.

	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 (isMinNS4)
		layer.bgColor = color;
	if (isMinIE4 || isMinNS6)
		layer.style.backgroundColor = color;
}

function setBgImage(layer, src)
{
	if (isMinNS4)
		layer.background.src = src;
	if (isMinIE4 || isMinNS6)
		layer.style.backgroundImage = "url(" + src + ")";
}

function getWindowWidth()
{
	if (isMinNS4 || isMinNS6)
		return window.innerWidth;
	if (isMinIE4)
		return document.body.clientWidth;
	return -1;
}

function getWindowHeight()
{
	if (isMinNS4 || isMinNS6)
		return window.innerHeight;
	if (isMinIE4)
		return document.body.clientHeight;
	return -1;
}

function getPageWidth()
{
	if (isMinNS4 || isMinNS6)
		return document.width;
	if (isMinIE4)
		return document.body.scrollWidth;
	return -1;
}

function getPageHeight()
{
	if (isMinNS4 || isMinNS6)
		return document.height;
	if (isMinIE4)
		return document.body.scrollHeight;
	return -1;
}

function getPageScrollX()
{
	if (isMinNS4 || isMinNS6)
		return window.pageXOffset;
	if (isMinIE4)
		return document.body.scrollLeft;
	return -1;
}

function getPageScrollY()
{
	if (isMinNS4 || isMinNS6)
		return window.pageYOffset;
	if (isMinIE4)
		return document.body.scrollTop;
	return -1;
}

function getLayer(name)
{
	if (isMinNS4)
		return findLayer(name, document);
	if (isMinIE4)
		return eval('document.all.' + name);
	if (isMinNS6)
		return document.getElementById(name);
	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)
		{
			layer = findLayer(name, layer.document);
			if (layer != null)
				return layer;
		}
	}
	return null;
}