function browser(){
	if(navigator.userAgent.indexOf("MSIE")!=-1 && navigator.userAgent.indexOf("Mac")!=-1){
		document.write('<link href="/css/mac_ie.css" rel="stylesheet" type="text/css" />');
	} else if(navigator.userAgent.indexOf("Safari")!=-1 && navigator.userAgent.indexOf("Mac")!=-1){
		document.write('<link href="/css/mac_sf.css" rel="stylesheet" type="text/css" />');
	} else if(navigator.userAgent.indexOf("Gecko")!=-1 && navigator.userAgent.indexOf("Mac")!=-1){
		document.write('<link href="/css/mac_ff.css" rel="stylesheet" type="text/css" />');
	} else{
		document.write('<link href="/css/default.css" rel="stylesheet" type="text/css" />');
	}
}
browser();