var userAgent = window.navigator.userAgent.toLowerCase();
var appVersion = window.navigator.appVersion.toLowerCase();
if (userAgent.indexOf("msie") > -1) {
//IE6
if (appVersion.indexOf("msie 6.0") > -1) {
//document.write('');
document.write('');
}
//IE7
else if (appVersion.indexOf("msie 7.0") > -1) {
//document.write('');
document.write('');
}
}
else{
document.write(' ');
document.write('');
}