var isMinNS4 = (navigator.appName.indexOf("Netscape") >= 0 && parseFloat(navigator.appVersion) >= 4) ? 1 : 0;
var isMinIE4 = (document.all) ? 1 : 0;
var isMinIE5 = (isMinIE4 && navigator.appVersion.indexOf("5.") >= 0) ? 1 : 0;


function hideLayer(layer) {

if (isMinNS4)
layer.visibility = "hide";
if (isMinIE4)
layer.style.visibility = "hidden";
}

function showLayer(layer) {

if (isMinNS4)
layer.visibility = "show";
if (isMinIE4)
layer.style.visibility = "visible";
}

function inheritLayer(layer) {

if (isMinNS4)
layer.visibility = "inherit";
if (isMinIE4)
layer.style.visibility = "inherit";
}

function getVisibility(layer) {

if (isMinNS4) {
if (layer.visibility == "show")
return "visible";
if (layer.visibility == "hide")
return "hidden";
return layer.visibility;
}
if (isMinIE4)
return layer.style.visibility;
return "";
}


function moveLayerTo(layer, x, y) {

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

function moveLayerBy(layer, dx, dy) {

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

function getLeft(layer) {

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

function getTop(layer) {

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

function getRight(layer) {

if (isMinNS4)
return layer.left + getWidth(layer);
if (isMinIE4)
return layer.style.pixelLeft + getWidth(layer);
return -1;
}

function getBottom(layer) {

if (isMinNS4)
return layer.top + getHeight(layer);
if (isMinIE4)
return layer.style.pixelTop + getHeight(layer);
return -1;
}

function getPageLeft(layer) {

var x;

if (isMinNS4)
return layer.pageX;
if (isMinIE4) {
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 (isMinNS4)
return layer.pageY;
if (isMinIE4) {
y = 0;
while (layer.offsetParent != null) {
y += layer.offsetTop;
layer = layer.offsetParent;
}
y += layer.offsetTop;
return y;
}
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;
}
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 (layer.style.pixelHeight)
return layer.style.pixelHeight;
else
return layer.clientHeight;
}
return -1;
}

function getzIndex(layer) {

if (isMinNS4)
return layer.zIndex;
if (isMinIE4)
return layer.style.zIndex;

return -1;
}

function setzIndex(layer, z) {

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


function clipLayer(layer, clipleft, cliptop, clipright, clipbottom) {

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

function getClipLeft(layer) {

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

function getClipTop(layer) {

if (isMinNS4)
return layer.clip.top;
if (isMinIE4) {
var str =  layer.style.clip;
if (!str)
return 0;
var clip = getIEClipValues(layer.style.clip);
return clip[0];
}
return -1;
}

function getClipRight(layer) {

if (isMinNS4)
return layer.clip.right;
if (isMinIE4) {
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 (isMinNS4)
return layer.clip.bottom;
if (isMinIE4) {
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 (isMinNS4)
return layer.clip.width;
if (isMinIE4) {
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 (isMinNS4)
return layer.clip.height;
if (isMinIE4) {
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;

// 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)
layer.style.backgroundColor = color;
}

function setBgImage(layer, src) {

if (isMinNS4)
layer.background.src = src;
if (isMinIE4)
layer.style.backgroundImage = "url(" + src + ")";
}


function getLayer(name) {

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


function getImage(name) {

if (isMinNS4) {
return findImage(name, document);
}
if (isMinIE4)
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 (isMinNS4) {
if (img.container != null)
return img.container.pageX + img.x;
else
return img.x;
}
if (isMinIE4) {
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 (isMinNS4) {
if (img.container != null)
return img.container.pageY + img.y;
else
return img.y;
}
if (isMinIE4) {
y = 0;
obj = img;
while (obj.offsetParent != null) {
y += obj.offsetTop;
obj = obj.offsetParent;
}
y += obj.offsetTop;
return y;
}
return -1;
}


function getWindowWidth() {

if (isMinNS4)
return window.innerWidth;
if (isMinIE4)
return document.body.clientWidth;
return -1;
}

function getWindowHeight() {

if (isMinNS4)
return window.innerHeight;
if (isMinIE4)
return document.body.clientHeight;
return -1;
}

function getPageWidth() {

if (isMinNS4)
return document.width;
if (isMinIE4)
return document.body.scrollWidth;
return -1;
}

function getPageHeight() {

if (isMinNS4)
return document.height;
if (isMinIE4)
return document.body.scrollHeight;
return -1;
}

function getPageScrollX() {

if (isMinNS4)
return window.pageXOffset;
if (isMinIE4)
return document.body.scrollLeft;
return -1;
}

function getPageScrollY() {

if (isMinNS4)
return window.pageYOffset;
if (isMinIE4)
return document.body.scrollTop;
return -1;
}