function onPageLoad() {
    setDivWidths();
}

function setDivWidths() {
    var contentHeight = document.getElementById("mainContentDiv").offsetHeight;
    var directoryHeight = document.getElementById("leftContentDiv").offsetHeight;

    var height = contentHeight;
    if (directoryHeight > contentHeight) {
        height = directoryHeight;
        document.getElementById("topLink").style.display = "none";
    }
    document.getElementById("mainContentDiv").style.height = height + "px";
    document.getElementById("leftContentDiv").style.height = height + "px";
    document.getElementById("rightContentDiv").style.height = height + "px"; 

    var footerHeight = document.getElementById("mainFooterDiv").offsetHeight;
    document.getElementById("leftFooterDiv").style.height = footerHeight + "px";
    document.getElementById("rightFooterDiv").style.height = footerHeight + "px";
}