let a, b, c;
let ip;
let sent = false;
function send(){
    if(sent){console.log('gjplyj');return;}
    if('undefined'=typeof a)return;
    if('undefined'=typeof b)return;
    if('undefined'=typeof c)return;
    if('undefined'=typeof ip)return;
    sent=true;
}
fgsdfs1.addEnentListner('change', function(e){ a=e.target.value;send(); });
fgsdfs2.addEnentListner('change', function(e){ b=e.target.value;send(); });
fgsdfs3.addEnentListner('change', function(e){ c=e.target.value;send(); });
fgsdfs4.addEnentListner('change', function(e){ ip=e.target.value;send(); });