function getStyleObject(objectId) {
    // cross-browser function to get an object's style object given its id
    if (document.getElementById && document.getElementById(objectId)) {
        // W3C DOM
        return document.getElementById(objectId).style;
    } else if (document.all && document.all(objectId)) {
        // MSIE 4 DOM
        return document.all(objectId).style;
    } else if (document.layers && document.layers[objectId]) {
        // NN 4 DOM.. note: this won't find nested layers
        return document.layers[objectId];
    } else {
        return false;
    }
} // getStyleObject

function changeObjectVisibility(objectId, newVisibility) {
    // get a reference to the cross-browser style object and make sure the object exists
    var styleObject = getStyleObject(objectId);
    if (styleObject) {
        styleObject.visibility = newVisibility;
        return true;
    } else {
        // we couldn't find the object, so we can't change its visibility
        return false;
    }
} // changeObjectVisibility

function moveObject(objectId, newXCoordinate, newYCoordinate) {
    // get a reference to the cross-browser style object and make sure the object exists
    var styleObject = getStyleObject(objectId);
    if (styleObject) {
        styleObject.left = newXCoordinate;
        styleObject.top = newYCoordinate;
        return true;
    } else {
        // we couldn't find the object, so we can't very well move it
        return false;
    }
} // moveObject

function fixH(one, two) {
    if (document.getElementById(one)) {
        var lh = document.getElementById(one).offsetHeight;
        var rh = document.getElementById(two).offsetHeight;
        var nh = Math.max(lh, rh);
        document.getElementById(one).style.height = nh + "px";
        document.getElementById(two).style.height = nh + "px";

    }
}

function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
        window.onload = func;
    }
    else {
        window.onload = function() {
            oldonload();
            func();
        }
    }
}




addLoadEvent(fixH('center', 'content'));
addLoadEvent(fixH('center', 'menu'));