// DHTMLapi.js custom API for cross-platform
// object positioning by Danny Goodman (http://www.dannyg.com)

// Global variables
var isNav, isIE
var coll = ""
var styleObj = ""
if (parseInt(navigator.appVersion) >= 4)
{
	if (navigator.appName == "Netscape")
	{
		isNav = true
	}
	else
	{
		isIE = true
		coll = "all."
		styleObj = ".style"
	}
}

// Convert object name string or object reference
// into a valid object reference
function getObject(obj)
{
	var theObj
	if (typeof obj == "string")
	{
		theObj = eval("document." + coll + obj + styleObj)
	}
	else
	{
		theObj = obj
	}
	return theObj
}

// Positioning an object at a specific pixel coordinate
function shiftTo(obj, x, y)
{
	var theObj = getObject(obj)
	if (isNav)
	{
		theObj.moveTo(x,y)
	}
	else
	{
		theObj.pixelLeft = x
		theObj.pixelTop = y
	}
}

// Moving an object by x and/or y pixels
function shiftBy(obj, deltaX, deltaY)
{
	var theObj = getObject(obj)
	if (isNav)
	{
		theObj.moveBy(deltaX, deltaY)
	}
	else
	{
		theObj.pixelLeft += deltaX
		theObj.pixelTop += deltaY
	}
}

// Setting the z-order of an object
function setZIndex(obj, zOrder)
{
	var theObj = getObject(obj)
	theObj.zIndex = zOrder
}

// Setting the background color of an object
function setBGColor(obj, color)
{
	var theObj = getObject(obj)
	if (isNav)
	{
		theObj.bgColor = color
	}
	else
	{
		theObj.backgroundColor = color
	}
}

// Setting the visibility of an object to visible
function show(obj)
{
	var theObj = getObject(obj)
	theObj.visibility = "visible"
}

// Setting the visibility of an object to hidden
function hide(obj)
{
	var theObj = getObject(obj)
	theObj.visibility = "hidden"
}

// retrieving the x coordinate of a positionable object
function getObjectLeft(obj)
{
	var theObj = getObject(obj)
	if (isNav)
	{
		return theObj.left
	}
	else
	{
		return theObj.pixelLeft
	}
}

// retrieving the y coordinate of a positionable object
function getObjectTop(obj)
{
		var theObj = getObject(obj)
	if (isNav)
	{
		return theObj.top
	}
	else
	{
		return theObj.pixelTop
	}
}

// End of Danny's API


// Utility function returns rendered height of object content in pixels
function getObjHeight(obj)
{
	if (isNav)
	{
		return obj.clip.height
	}
	else
	{
		return obj.clientHeight
	}
}

// Utility function returns rendered width of object in pixels
function getObjWidth(obj)
{
	if (isNav)
	{
		return obj.clip.width
	}
	else
	{
		return obj.clientWidth
	}
}

// Utility function returns the available content width space in browser window
function getInsideWindowWidth()
{
	if (isNav)
	{
		return window.innerWidth
	}
	else
	{
		return document.body.clientWidth
	}
}

// Utility function returns tha available content height space in browser window
function getInsideWindowHeight()
{
	if (isNav)
	{
		return window.innerHeight
	}
	else
	{
		return document.body.clientHeight
	}
}