mac=(navigator.appVersion.indexOf("Mac")!=-1)?true:false;

if(mac){
	if(navigator.appName == 'Microsoft Internet Explorer'){
		cssName = "mac_ie.css";
		//alert("mac_ie");
	}else if(navigator.userAgent.indexOf('Safari') != -1){
		cssName = "mac_ie.css";
		//alert("mac_safari");
	}else if(navigator.appName == 'Netscape'){
		cssName = "mac_ns.css";
	}else{
		cssName = "mac_ie.css";
	}
}else{
	if(navigator.appName == 'Microsoft Internet Explorer'){
		cssName = "win_ie.css";
	}else if(navigator.appName == 'Netscape'){
		cssName = "win_ns.css";
	}else{
		cssName = "win_ie.css";
	}
}

document.write("<link rel='stylesheet' href='../j_css/"+cssName+"' type='text/css'>");