var css_pc_ie = "size11.css";
var css_pc_ns = "size12.css";
var css_mac_ie = "size11.css";
var css_mac_ie_5 = "size11.css";
var css_mac_ns = "size11.css";
var css_mac_ns_6 = "size11.css";
var css_other  = "size11.css";
var usecss   = "";

if(navigator.userAgent.indexOf("Win")>=0) {

        if(navigator.appName.indexOf("Microsoft")>=0) 
                usecss=css_pc_ie;
        else if((navigator.appName.indexOf("Netscape")>=0) && (parseInt(navigator.appVersion)<=4)){
        			usecss=css_pc_ns;
                } else {
                	usecss=css_pc_ie; 
                	}
}
else if(navigator.userAgent.indexOf("Mac")>=0) {
        if(navigator.appName.indexOf("Microsoft")>=0) {
                if(navigator.appVersion.indexOf("MSIE 5")>=0)
                        usecss=css_mac_ie_5;
                else 
                        usecss=css_mac_ie;
        }
        else if(navigator.appName.indexOf("Netscape")>=0)
                {
                if(parseInt(navigator.appVersion)>=5) { usecss=css_mac_ns_6; }
                else { usecss=css_mac_ns; }
                }
}
else  
        usecss=css_other;

document.write("\n<link rel='stylesheet' href='/includes/"+usecss+"' type='text/css'>");
//alert(parseInt(navigator.appVersion));
//alert("\n<link rel='stylesheet' href='/includes/"+usecss+"' type='text/css'>");