nginx不允许下拉菜单

Question

I was having trouble setting up my php configuration, here.
Now that I have this fixed, I think that it is causing errors with my dropdown menus.

I am using bootstrap, and when I navigate to bootstraps example page, the dropdown menu works perfectly. When I copy the source code from the website into a sample file on my website, it doesn't work as expected.
(note: the dropdown did work before I changed my config).

If anything else is needed, just say.

current nginx config

listen       80;
server_name  hamhut1066.com;
root   /srv/http/public;
index index.php index.html index.htm;

location / {
    try_files $uri $uri/ /index.php;
}

location ~ \.php {
    include fastcgi.conf;
    fastcgi_pass   unix:/run/php-fpm/php-fpm.sock;
}

error_page   500 502 503 504  /50x.html;
location = /50x.html {
    root   html;
}