mac = (navigator.appVersion.indexOf("Mac")!=-1)?true:false;
win = (navigator.appVersion.indexOf("Win")!=-1)?true:false;
ie = (navigator.appName.charAt(0) == "M")?true:false;
nn = (navigator.appName.charAt(0) == "N")?true:false;

//
if(mac && ie)
document.writeln('<link rel=\"stylesheet\" type=\"text/css\" href=\"share/css/font_mac.css\" title=\"fontproperty\">');
if(mac && !ie)
document.writeln('<link rel=\"stylesheet\" type=\"text/css\" href=\"share/css/font_mac.css\" title=\"fontproperty\">');
if(win && ie)
document.writeln('<link rel=\"stylesheet\" type=\"text/css\" href=\"share/css/font_win.css\" title=\"fontproperty\">');
if(win && !ie)
document.writeln('<link rel=\"stylesheet\" type=\"text/css\" href=\"share/css/font_win.css\" title=\"fontproperty\">');