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

// Global variables
var isNav, isIE, isMac
var coll = ""
var styleObj = ""
if (parseInt(navigator.appVersion) >= 4 && navigator.userAgent.indexOf("Mac") <= -1)
{
	if (navigator.appName == "Netscape")
	{
		isNav = true
	}
	else
	{
		isIE = true
		coll = "all."
		styleObj = ".style"
	}
}
else if (navigator.userAgent.indexOf("Mac") > -1)
{
  isMac = true
}

// Special handling for CSS-P redraw bug in Navigator 4
function handleResize()
{
  if (isNav)
  {
    // causes extra re-draw if the version isn't 4.08
    if (parseFloat(navigator.appVersion) != 4.08) // && parseFloat(navigator.appVersion) >= 4.1)
      {
        location.reload()
      }
  }
}

// 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 (isNav4)
	{
		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 (isNav4)
	{
		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 (isNav4)
	{
		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 (isNav4)
	{
		return theObj.left
	}
	else
	{
		return theObj.pixelLeft
	}
}

// Retrieving the y coordinate of a positionable object
function getObjectTop(obj)
{
	var theObj = getObject(obj)
	if (isNav4)
	{
		return theObj.top
	}
	else
	{
		return theObj.pixelTop
	}
}