n4u_sample/apps/n2o_sample/priv/js/testcities.js

function cityshow(){
  var timerId = setTimeout(function tick(){
      if(window.active){

        if(window.getting_data !== true){
          window.getting_data = true;

          qi('citiesshow').disabled = true;
          ws.send(enc(tuple( atom('client'), tuple(atom('sitiesshow') ) )));
        }

      }else{
        timerId = setTimeout(tick, 200);
      }
  }, 100);
}


function cityadd(){
  var timerId = setTimeout(function tick(){
      if(window.active){

        if(window.sending_data !== true){
          window.sending_data = true;

          qi('cityadd').disabled = true;
          ws.send(enc(tuple( atom('client'), tuple(atom('cityadd'), querySource('cityname'), number(qi('citypop').value) ) )));
        }

      }else{
        timerId = setTimeout(tick, 200);
      }
  }, 100);
}


window.addEventListener("load", function(){

  qi('citiesshow').addEventListener("click", cityshow, false);
  qi('cityadd').addEventListener("click", cityadd, false);

},false);