/*
* Author: Rob Reid
* CreateDate: 20-Mar-09
* Description: Little helper function to return details about IE 8 and its various compatibility settings either use as it is
* or incorporate into a browser object. Remember browser sniffing is not the best way to detect user-settings as spoofing is
* very common so use with caution.
*/
function IEVersion() {
    var _n = navigator, _w = window, _d = document;
    var version = "NA";
    var na = _n.userAgent;
    var ieDocMode = "NA";
    var ie8BrowserMode = "";
    var ieBrowserinfo = "NA";
    // Look for msie and make sure its not opera in disguise
    if (/msie/i.test(na) && (!_w.opera)) {
        // also check for spoofers by checking known IE objects
        if (_w.attachEvent && _w.ActiveXObject) {
            // Get version displayed in UA although if its IE 8 running in 7 or compat mode it will appear as 7
            version = (na.match(/.+ie\s([\d.]+)/i) || [])[1];
            // Its IE 8 pretending to be IE 7 or in compat mode		
            if (parseInt(version) == 7) {
                // documentMode is only supported in IE 8 so we know if its here its really IE 8
                if (_d.documentMode) {
                    version = 7; //reset? change if you need to
                    // IE in Compat mode will mention Trident in the useragent
                    if (/trident\/\d/i.test(na)) {
                        ie8BrowserMode = "Compatible Mode";
                        // if it doesn't then its running in IE 7 mode
                    } else {
                        ie8BrowserMode = "Compatible Mode";
                    }
                }
            } else if (parseInt(version) == 8) {
                version = 8;
                if (/trident\/\d/i.test(na)) {
                    ie8BrowserMode = "Compatible Mode";
                    // if it doesn't then its running in IE 7 mode
                } else {
                    ie8BrowserMode = "";
                }
                //if(_d.documentMode){ ie8BrowserMode = "IE 8 Mode";}
            }
            else if (parseInt(version) == 9) {
                // IE 9 will always have documentMode available
                if (_d.documentMode) { //ie8BrowserMode = "IE 9 Mode";
                }
            }
            ieDocMode = (_d.documentMode) ? _d.documentMode : (_d.compatMode && _d.compatMode == "CSS1Compat") ? 7 : 5; //default to quirks mode IE5
            if (parseInt(version) == 8 && parseInt(ieDocMode) == 8) {
                ieBrowserinfo = "Internet Explorer " + version; // +" " + ie8BrowserMode
            }
            else {
                ieBrowserinfo = "Internet Explorer " + version + " " + ie8BrowserMode
            }
        }
    }

    return {
        "UserAgent": na,
        "Version": version,
        "BrowserMode": ie8BrowserMode,
        "DocMode": ieDocMode,
        "BrowserInfo": ieBrowserinfo
    }
}