function getInternetExplorerVersion() {
    var rv = -1
    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)
        }
    }
    return rv
}

function onLoadLogo() {
    if (getInternetExplorerVersion() >= 8.0) {
        var e = document.getElementById('logo')
        e.style.margin = "0 0 0 -774px"
    }
}