// MAC IE 5x
var os = 0;
if(navigator.userAgent.indexOf("Mac") != -1 )
{
os = 1
}

// Win IE 5x
var os = 0;
if(navigator.userAgent.indexOf("MSIE 5") != -1)
{
os = 1
}

var ua = 0;
var strUA = "";
strUA = navigator.userAgent.toLowerCase();
if(strUA.indexOf("msie") != -1){
ua = 1
}
if ( os == 1 && ua == 1 ){
document.location = "index5.x.html"
}