switch(location.host){

case 'www.zhejianganxin.com':
case 'zhejianganxin.com':

location.href="/ax/"

break;

case 'www.fx-bearing.com':
case 'fx-bearing.com':

location.href="/zy/"

break;

case 'www.yangping.cn':
case 'yangping.cn':

location.href="/yp/"

break;

}