window.onresize = function() { UpdateScreenHeight(); }

/* Hoogte van Wrapper en LeftMenu uitrekenen */
function UpdateScreenHeight()
{
    var documentHeight = document.getElementsByTagName('html')[0].clientHeight - 2;
    document.getElementById('Wrapper').style.height = 'auto';

    if ( document.getElementById('Content').clientHeight >= document.getElementById('LeftMenu').clientHeight )
    {
        document.getElementById('LeftMenu').style.height = document.getElementById('Content').clientHeight+'px';
    }
    else
    {
        document.getElementById('LeftMenu').style.height = 'auto';
    }

    if ( documentHeight > document.getElementById('Wrapper').clientHeight + 54 )
    {
        var wrapperHeight  = documentHeight - document.getElementById('Footer').clientHeight;
        var leftMenuHeight = wrapperHeight - ( document.getElementById('Header').clientHeight 
                                               + document.getElementById('Navigation').clientHeight );
        document.getElementById('Wrapper').style.height = wrapperHeight + "px";

        if ( document.getElementById('Content').clientHeight > leftMenuHeight )
            leftMenuHeight = document.getElementById('Content').clientHeight;

        document.getElementById('LeftMenu').style.height = leftMenuHeight + "px";
    }
}

/* Pakketten */
function UpdatePakkettenImage( position )
{
    var newPosition = document.getElementById('Pakketten').height * position;

    if (newPosition)
        document.getElementById('Pakketten').style.backgroundPosition='left -'+newPosition+'px';
    else
        ResetPakkettenImage();
}

function ResetPakkettenImage()
{
    document.getElementById('Pakketten').style.backgroundPosition='left top';
}

/* Nieuws */
function ChangeNieuwsData( id, currentItem, leaveButtonsAlone )
{
    if ( currentItem != null )
    {
        items = document.getElementsByName( 'NieuwsTableLeftColumnItem' );

        for(i=0;i<items.length;i++)
        {
            if (items[i] == currentItem)
                items[i].className = 'Selected';
            else
                items[i].className = '';
        }
    }

    document.getElementById('NieuwsColumn').innerHTML = document.getElementById('NieuwsColumnData_'+id).innerHTML;
}