function openWindow(url) {
    popupWin = window.open(url, 'openWin', "width=400, height=350, scrollbars=yes, resizable=yes");
}

engine = null;
if (window.navigator.appName == "Microsoft Internet Explorer") {
    // This is an IE browser. What mode is the engine in?
    if (document.documentMode) { // IE8
        engine = document.documentMode;
    }
    else // IE 5-7
    {
        engine = 5; // Assume quirks mode unless proven otherwise
        if (document.compatMode) {
            if (document.compatMode == "CSS1Compat")
                engine = 7; // standards mode
        }
    }
    // the engine variable now contains the document compatibility mode.
    //if (engine == 8) {
    //    alert('This website is not compatible with Internet Explorer 8.\n-- Please use compatibility mode while viewing this website.\n-- Compatibility View is located next to the URL or by clicking Tools > Compatibility View.');
    //}
}