ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false
var browserName=navigator.appName;
var browserVer=(parseInt(navigator.appVersion)+1);
if (navigator.userAgent.indexOf('Mac') != -1 && navigator.appName.indexOf('Netscape') != -1)
{
document.write("");
//alert("nav_mac");
}
else if (ns4){
document.write("");
//alert("ns4");
}
else if (browserName=='Netscape' && browserVer==6){
document.write("");
//alert("ns6");
}
else {
document.write("");
//alert("ie");
}