var uab = navigator.userAgent.toLowerCase(); 
//alert(ua);
// IF ANY VERSION OF MAC BROWSER
if (uab.indexOf('macintosh') != -1){document.write('<link href="http://www.shsu.edu/~shsu_web/styles/mac.css" rel="stylesheet" type="text/css" media="screen" />');}
/*If pc safari*///if (ua.indexOf('safari/') != -1){document.write('<link href="styles/PCsafari.css" rel="stylesheet" type="text/css" media="screen" />');}
/*If mac safari*/
//if (ua.indexOf('safari/') != -1 && ua.indexOf('macintosh') != -1){document.write('<link href="http://www.shsu.edu/~shsu_web/styles/mac.css" rel="stylesheet" type="text/css" media="screen" />');}
/*If mac firefox3*/
//if((ua.indexOf('firefox/') != -1) && ua.indexOf('macintosh') != -1 ){document.write('<link href="styles/mac.css" rel="stylesheet" type="text/css" media="screen" />');}