// Detect IE8

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 checkVersion() {    
    var msg = "You're not using Windows Internet Explorer.";    
    var ver = getInternetExplorerVersion();    
    if (ver > -1) {        
        if (ver >= 8.0) 
            return true;           
            //msg = "You're using a recent copy of Windows Internet Explorer."        
        else  
            return false;         
            //msg = "You should upgrade your copy of Windows Internet Explorer.";    
    }    
    //alert(msg);
}