if((navigator.userAgent.indexOf("Apple") > -1)){
	document.write('<link rel="stylesheet" type="text/css" href="css/mac_safari.css">');

}else if((navigator.userAgent.indexOf("Mac",0)!=-1)&&(navigator.userAgent.indexOf("Gecko") != -1)){
	document.write('<link rel="stylesheet" type="text/css" href="css/mac_gecko.css">');

}else if((navigator.userAgent.indexOf("MSIE",0)!=-1)&&(navigator.userAgent.indexOf("Mac",0)!=-1)){
	document.write('<link rel="stylesheet" type="text/css" href="css/mac_ie.css">');

}else if((navigator.appName=="Netscape")&&(parseInt(navigator.appVersion)>=5)){
	document.write('<link rel="stylesheet" type="text/css" href="css/win_gecko.css">');
	
}else{
	document.write('<link rel="stylesheet" type="text/css" href="css/win_ie.css">');
}