// JavaScript Document
function getInternetExplorerVersion() {

    var rv = -1; // Return value assumes failure.

    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 isIE8() {

    var msg = "You're not using Windows Internet Explorer.";

    var ver = getInternetExplorerVersion();

    if (ver > -1) {

        if (ver >= 8.0)

            return true;

        else

            return false;

    }

    //alert(msg);

}