var agt=navigator.userAgent.toLowerCase();  
var is_major = parseInt(navigator.appVersion); 
var is_minor = parseFloat(navigator.appVersion); 
    var is_ie   = (agt.indexOf("msie") != -1); 
    var is_ie3  = (is_ie && (is_major < 4)); 
    var is_ie4  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")==-1) ); 
    var is_ie4up  = (is_ie  && (is_major >= 4)); 
    var is_ie5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) ); 
    var is_ie5up  = (is_ie  && !is_ie3 && !is_ie4); 

var nav;
if (agt.indexOf("mac")!=-1) {
	if ( navigator.userAgent.indexOf("MSIE") != -1 ) {
		if ( is_ie4up && !is_ie5up ){
			document.write (' <link rel="stylesheet" type="text/css" href="http://' + parent.location.hostname + '/css/stylemacie4.css"> ') ;
    

		} else {
			document.write (' <link rel="stylesheet" type="text/css" href="http://' + parent.location.hostname + '/css/stylemac.css"> ') ;
		}
		nav = 'IE';
		
	} else {
		document.write (' <link rel="stylesheet" type="text/css" href="http://' + parent.location.hostname + '/css/stylemacnet.css">  ') ;
		nav = 'NE';
	}
} else {
	if ( navigator.userAgent.indexOf("MSIE") != -1 ) {	
		document.write (' <link rel="stylesheet" type="text/css" href="http://' + parent.location.hostname + '/css/styleie.css"> ') ;
		nav = 'IE';
	} else {
		document.write (' <link rel="stylesheet" type="text/css" href="http://' + parent.location.hostname + '/css/stylenet.css">  ') ;
		nav = 'NE';
	}
}