/* layerlib.js: Simple Layer library with basic
compatibility checking */
/* detect objects */
var layerobject = ((document.layers) ? (true) : (false));
var dom = ((document.getElementById) ? (true) : (false));
var allobject = ((document.all) ? (true) : (false));
/* detect browsers */
opera=navigator.userAgent.toLowerCase().indexOf('opera')!=-1;
/* return the object for the passed layerName value */
function getElement(layerName,parentLayer)
{
if(layerobject)
{
parentLayer = (parentLayer)? parentLayer : self; layerCollection = parentLayer.document.layers;
if (layerCollection[layerName])
return layerCollection[layerName];
/* look through nested layers */
for(i=0; i < layerCollection.length;)
return(getElement(layerName, layerCollection[i++]));
}
if (allobject)
return document.all[layerName];
if (dom)
return document.getElementById(layerName);
}
/* hide the layer with id = layerName */
function hide(layerName)
{
var theLayer = getElement(layerName);
if (layerobject)
theLayer.visibility = 'hide';
else
theLayer.style.visibility = 'hidden';
}
/* show the layer with id = layerName */
function show(layerName)
{
var theLayer = getElement(layerName);
if (layerobject)
theLayer.visibility = 'show';
else
theLayer.style.visibility = 'visible';
}
/* set the x-coordinate of layer named layerName */
function setX(layerName, x)
{
var theLayer = getElement(layerName);
if (layerobject)
theLayer.left=x;
else if (opera)
theLayer.style.pixelLeft=x;
else
theLayer.style.left=x+"px";
}
/* set the y-coordinate of layer named layerName */
function setY(layerName, y)
{
var theLayer = getElement(layerName);
if (layerobject)
theLayer.top=y;
else if (opera)
theLayer.style.pixelTop=y;
else
theLayer.style.top=y+"px";
}
/* set the z-index of layer named layerName */
function setZ(layerName, zIndex)
{
var theLayer = getElement(layerName);
if (layerobject)
theLayer.zIndex = zIndex;
else
theLayer.style.zIndex = zIndex;
}
/* set the height of layer named layerName */
function setHeight(layerName, height)
{
var theLayer = getElement(layerName);
if (layerobject)
theLayer.clip.height = height;
else if (opera)
theLayer.style.pixelHeight = height;
else
theLayer.style.height = height+"px";
}
/* set the width of layer named layerName */
function setWidth(layerName, width)
{
var theLayer = getElement(layerName);
if (layerobject)
theLayer.clip.width = width;
else if (opera)
theLayer.style.pixelWidth = width;
else
theLayer.style.width = width+"px";
}
/* set the clipping rectangle on the layer named layerName
defined by top, right, bottom, and left */
function setClip(layerName, top, right, bottom, left)
{
var theLayer = getElement(layerName);
if (layerobject)
{
theLayer.clip.top = top;
theLayer.clip.right = right;
theLayer.clip.bottom = bottom;
theLayer.clip.left = left;
}
else
theLayer.style.clip = "rect("+top+"px "+right+"px "+" "+bottom+"px "+left+"px)";
}
/* set the contents of layerName to passed content*/
function setContents(layerName, content)
{
var theLayer = getElement(layerName);
if (layerobject)
{
theLayer.document.write(content);
theLayer.document.close();
return;
}
if (theLayer.innerHTML) 

theLayer.innerHTML = content;

}
/* function added for HW2 by kohlsen */
function getX(layerName){
	var theLayer = getElement(layerName);
	var props = layerName+": left"+theLayer.left;
	props+= "\nstyle.left"+theLayer.style.left;
	props+= "\npixelLeft"+theLayer.style.pixelLeft;
	alert(props);
	if (layerobject) 
		var currentX = parseInt(theLayer.left);
	else if (opera) 
		var currentX = parseInt(theLayer.style.pixelLeft);
	else 
		var currentX = parseInt(theLayer.style.left);
return currentX;

}
function getY(layerName) { 
var theLayer = getElement(layerName);
alert(layerName+theLayer.style.top)
if (layerobject)
  var currentY= parseInt(theLayer.top);
  else if (opera)
  var currentY= parseInt(theLayer.style.pixelTop);
  else
  var currentY= parseInt(theLayer.style.top);

return currentY;

}
//script added from quirksmode.org 12/8/08 KLO
function findPos(obj) {
	var curleft = curtop = 0;
	if (obj.offsetParent) {
		do {
			curleft += obj.offsetLeft;
			curtop += obj.offsetTop;
			
			alert(obj.id+"left"+obj.offsetLeft+"top"+obj.offsetTop)
		}
		while (obj = obj.offsetParent);
			return [curleft, curtop];
		
	}
}