if ((navigator.userAgent.indexOf('Opera') != -1))
        {document.write('<style type="text/css">@import"/styles/Opera-main.css";</style>');}
else if ((navigator.appName.indexOf('Microsoft Internet Explorer') != -1)) 
        {document.write('<style type="text/css">@import"/styles/IE-main.css";</style>');}
else if ((navigator.appName.indexOf('Mozilla') != -1)) 
        {document.write('<style type="text/css">@import"/styles/Moz-main.css";</style>');}
else if ((navigator.appName.indexOf('Netscape') != -1)) 
        {document.write('<style type="text/css">@import"/styles/Moz-main.css";</style>');}
else
        {document.write('<style type="text/css">@import"/styles/Oth-main.css";</style>');}