var nVer = navigator.appVersion;
var nAgt = navigator.userAgent;
var browserName  = '';
var fullVersion  = 0; 
var majorVersion = 0;

// In Internet Explorer, the true version is after "MSIE" in userAgent
if ((verOffset=nAgt.indexOf("MSIE"))!=-1) {
 top.location.href="erroIE.asp"
}