if( document.documentElement )
        bodyStyle = document.documentElement.style;
else if( document.body )
        bodyStyle = document.body.style;

bodyStyle.visibility = "hidden";

function sizeContent(){
        var windowHeight = getWindowHeight();
        var footerHeight = document.getElementById("fbFooter").offsetHeight;

        var contentHeight = windowHeight - footerHeight;
        document.getElementById("fbContainer").style.height = (contentHeight-85 )+ "px";

        var altDiv = document.getElementById("altmsg");

        if( altDiv ){
                var altH = altDiv.offsetHeight;
                var altW = altDiv.offsetWidth;
                altDiv.style.top = (contentHeight / 2 - altH /2-40)+ "px";
                altDiv.style.left = (getWindowWidth() / 2 - altW /2)+ "px";
        }

        if( bodyStyle )
                bodyStyle.visibility = "visible";
}

function addEvent( obj, type, fn )
{
        if (obj.addEventListener)
                obj.addEventListener( type, fn, false );
        else if (obj.attachEvent)
        {
                obj["e"+type+fn] = fn;
                obj.attachEvent( "on"+type, function() { obj["e"+type+fn](); } );
        }
}

function getWindowHeight() {
        var windowHeight=0;
        if ( typeof( window.innerHeight ) == 'number' ) {
                windowHeight=window.innerHeight;
        }
        else {
                if ( document.documentElement && document.documentElement.clientHeight) {
                        windowHeight = document.documentElement.clientHeight;
                }
                else {
                        if (document.body&&document.body.clientHeight) {
                                windowHeight=document.body.clientHeight;
                        }
                }
        }

        return windowHeight;
};

function getWindowWidth() {
        var ww = 0;
        if (self.innerWidth)
                ww = self.innerWidth;
        else if (document.documentElement && document.documentElement.clientWidth)
                ww = document.documentElement.clientWidth;
        else if (document.body)
                ww = document.body.clientWidth;
        return ww;
}

addEvent( window, "load", sizeContent);
addEvent( window, "resize", sizeContent );