// Determine browser.
var isMinNS4 = document.layers
var ie = document.all && navigator.userAgent.indexOf("Opera") == -1
var dom = document.getElementById && !ie && navigator.userAgent.indexOf("Opera") == -1
var isMinie8 = false;
if (navigator.appName == 'Microsoft Internet Explorer') {
        var ua = navigator.userAgent;
        var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
        if (re.exec(ua) != null)
        {
            rv = parseFloat(RegExp.$1);
            if (rv >= 8.0){isMinie8 = true;
            }
         }
 }

//-----------------------------------------------------------------------------
// Layer visibility.
//-----------------------------------------------------------------------------
function hideLayer(layer) {
    if (isMinNS4)
        layer.visibility = "hide";
    if (ie || dom)
        layer.style.visibility = "hidden";
}
function showLayer(layer) {
    if (isMinNS4)
        layer.visibility = "show";
    if (ie || dom)
        layer.style.visibility = "visible";
}
function inheritLayer(layer) {
    if (isMinNS4)
        layer.visibility = "inherit";
    if (ie || dom)
        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 (ie || dom)
        return layer.style.visibility;
    return "";
}
function isVisible(layer) {
    if (isMinNS4 && layer.visibility == "show")
        return (true);
    if (ie || dom && layer.style.visibility == "visible")
        return (true);
    return (false);
}
//-----------------------------------------------------------------------------
// Layer positioning.
//-----------------------------------------------------------------------------
function moveLayerTo(layer, x, y) {
    if (isMinNS4)
        layer.moveTo(x, y);
    if (ie || dom) {
        layer.style.left = x + 'px';
        layer.style.top = y + 'px';
    }
}
function moveLayerBy(layer, dx, dy) {
    if (isMinNS4)
        layer.moveBy(dx, dy);
    if (ie || dom) {
        layer.style.left = parseInt(layer.style.left) + dx + 'px';
        layer.style.top = parseInt(layer.style.top) + dy + 'px';
    }
}
function getLeft(layer) {
    if (isMinNS4)
        return (layer.left);
    if (ie || dom)
        return (parseInt(layer.style.left));
    return (-1);
}
function getTop(layer) {
    if (isMinNS4)
        return (layer.top);
    if (ie || dom)
        return (parseInt(layer.style.top));
    return (-1);
}
function getRight(layer) {
    if (isMinNS4)
        return (layer.left + getWidth(layer));
    if (ie || dom)
        return (parseInt(layer.style.left) + getWidth(layer));
    return (-1);
}
function getBottom(layer) {
    if (isMinNS4)
        return (layer.top + getHeight(layer));
    else if (ie || dom)
        return (parseInt(layer.style.top) + getHeight(layer));
    return (-1);
}
function getPageLeft(layer) {
    if (isMinNS4)
        return (layer.pageX);
    if (ie || dom)
        return (layer.offsetLeft);
    return (-1);
}
function getPageTop(layer) {
    if (isMinNS4)
        return (layer.pageY);
    if (ie || dom)
        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 (ie || dom) {
        if (layer.style.width)
            return (layer.style.width);
        else
            return (layer.offsetWidth);
    }
    return (-1);
}
function getHeight(layer) {
    if (isMinNS4) {
        if (layer.document.height)
            return (layer.document.height);
        else
            return (layer.clip.bottom - layer.clip.top);
    }
    if (ie || dom) {
        if (false && layer.style.height)
            return (layer.style.height);
        else
            return (layer.offsetHeight);
    }
    return (-1);
}
function getzIndex(layer) {
    if (isMinNS4)
        return (layer.zIndex);
    if (ie || dom)
        return (layer.style.zIndex);
    return (-1);
}
function setzIndex(layer, z) {
    if (isMinNS4)
        layer.zIndex = z;
    if (ie || dom)
        layer.style.zIndex = z;
}
//-----------------------------------------------------------------------------
// Layer clipping.
//-----------------------------------------------------------------------------
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 (isMinie8)
    {
        var rect ='rect(' + cliptop + 'px,' + clipright + 'px,' + clipbottom + 'px,' + clipleft + 'px)';
        layer.style.clip = rect;
    }
    else if (ie || dom)
    {
        layer.style.clip = 'rect(' + cliptop + 'px ' + clipright + 'px ' + clipbottom + 'px ' + clipleft + 'px)';
    }
}
function getClipLeft(layer) {
    if (isMinNS4)
        return (layer.clip.left);
    if (ie || dom) {
        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 (ie || dom) {
        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 (ie || dom) {
        var str = layer.style.clip;
        if (!str)
            return (layer.style.width);
        var clip = getIEClipValues(layer.style.clip);
        return (clip[1]);
    }
    return (-1);
}
function getClipBottom(layer) {
    if (isMinNS4)
        return (layer.clip.bottom);
    if (ie || dom) {
        var str = layer.style.clip;
        if (!str)
            return (layer.style.height);
        var clip = getIEClipValues(layer.style.clip);
        return (clip[2]);
    }
    return (-1);
}
function getClipWidth(layer) {
    if (isMinNS4)
        return (layer.clip.width);
    if (ie || dom) {
        var str = layer.style.clip;
        if (!str)
            return (layer.style.width);
        var clip = getIEClipValues(layer.style.clip);
        return (clip[1] - clip[3]);
    }
    return (-1);
}
function getClipHeight(layer) {
    if (isMinNS4)
        return (layer.clip.height);
    if (ie || dom) {
        var str = layer.style.clip;
        if (!str)
            return (layer.style.height);
        var clip = getIEClipValues(layer.style.clip);
        return (clip[2] - clip[0]);
    }
    return (-1);
}
function getIEClipValues(str) {
    var clip = new Array();
    var i;
    
    var separator = ' ';
   
    if (isMinie8)
        separator = ',';
        
    
    // Parse out the clipping values for IE layers.
    i = str.indexOf('(');
    clip[0] = parseInt(str.substring(i + 1, str.length), 10);
    i = str.indexOf(separator, i + 1);
    clip[1] = parseInt(str.substring(i + 1, str.length), 10);
    i = str.indexOf(separator, i + 1);
    clip[2] = parseInt(str.substring(i + 1, str.length), 10);
    i = str.indexOf(separator, i + 1);
    clip[3] = parseInt(str.substring(i + 1, str.length), 10);
    return (clip);
}
//-----------------------------------------------------------------------------
// Layer scrolling.
//-----------------------------------------------------------------------------
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);
}
//-----------------------------------------------------------------------------
// Layer background.
//-----------------------------------------------------------------------------
function setBgColor(layer, color) {
    if (isMinNS4)
        layer.bgColor = color;
    if (ie || dom)
        layer.style.backgroundColor = color;
}
function setBgImage(layer, src) {
    if (isMinNS4)
        layer.background.src = src;
    if (ie || dom)
        layer.style.backgroundImage = "url(" + src + ")";
}
//-----------------------------------------------------------------------------
// Layer utilities.
//-----------------------------------------------------------------------------
function getLayer(name) {
    if (isMinNS4)
        return findLayer(name, document);
    if (ie)
        return eval('document.all.' + name);
    if (dom)
        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;
}
//-----------------------------------------------------------------------------
// Window and page properties.
//-----------------------------------------------------------------------------
function getWindowWidth() {
    if (isMinNS4 || dom)
        return (window.innerWidth);
    if (ie)
        return (document.body.clientWidth);
    return (-1);
}
function getWindowHeight() {
    if (isMinNS4 || dom)
        return (window.innerHeight);
    if (ie)
        return (document.body.clientHeight);
    return (-1);
}
function getPageWidth() {
    if (isMinNS4 || dom)
        return (document.width);
    if (ie)
        return (document.body.scrollWidth);
    return (-1);
}
function getPageHeight() {
    if (isMinNS4 || dom)
        return (document.height);
    if (ie)
        return (document.body.scrollHeight);
    return (-1);
}
function getPageScrollX() {
    if (isMinNS4 || dom)
        return (window.pageXOffset);
    if (ie)
        return (document.body.scrollLeft);
    return (-1);
}
function getPageScrollY() {
    if (isMinNS4 || dom)
        return (window.pageYOffset);
    if (ie)
        return (document.body.scrollTop);
    return (-1);
}