var browser=navigator.appName;
//alert(navigator.appName+navigator.userAgent)	
	if (browser == "Microsoft Internet Explorer"){
		//var versione=parseInt(navigator.appVersion.substring(22,23));
		var NavStr='MSIE ';
		var re= new RegExp(NavStr,"i");
		var posizione = navigator.appVersion.search(re);
		var versione=navigator.appVersion.substring(posizione + NavStr.length, posizione + NavStr.length + 3);
		if (versione >= 5.5) {
			document.write('<link href="/images/creds/styleie.css" rel="stylesheet" type="text/css">');
                                //alert('0000');
		}
		else if (versione < 5.5 && versione > 5.0) {
			document.write('<link href="/images/creds/styleop.css" rel="stylesheet" type="text/css">');
                                //alert('1111');
		}
	}
	else if (browser == "Opera") {
//alert(navigator.userAgent.substring(6,10))	
		if(navigator.userAgent.substring(6,10)>=6.0) {
			document.write('<link href="/images/creds/styleop.css" rel="stylesheet" type="text/css">');
                                //alert('2222');
		}
	}
	else if (navigator.userAgent.indexOf("Gecko")) {
		versione=navigator.userAgent.substring(navigator.userAgent.indexOf("Mozilla") + 8, navigator.userAgent.indexOf("Mozilla") + 11);
		if (versione>=5.00) {
			if(navigator.userAgent.indexOf("Windows")){
				document.write('<link href="/images/creds/stylenn.css" rel="stylesheet" type="text/css">');
                                //alert('3333');
			}
			else if (navigator.userAgent.indexOf("Macintosh")) {
				document.write('<link href="/images/creds/stylenn.css" rel="stylesheet" type="text/css">');
                                //alert('4444');
			}
		}
	}