var browser;
if((navigator.appName=="Microsoft Internet Explorer")&&(parseInt(navigator.appVersion)>=4))
browser='ie4+';
else if((navigator.appName=="Netscape")&&(parseInt(navigator.appVersion)>=4))
browser='nn4+';
else
browser='Necesitas un navegador version 4 o superior';
if (browser=='ie4+')
document.writeln('<link rel="stylesheet" type="text/css" href="../css/torresweb.css">');
else
document.writeln('<link rel="stylesheet" type="text/css" href="../css/torreswebnn.css">');