why does javascript setTimeout() not work in a loop? [duplicate]

Answer 1

The i in your function refers to the i from the loop, which is 6 by the time any of the timeouts fire. You need to add a closure/scope:

  for( var i = 0 ; i < 3 ; i++ ) {
    (function(){    // create a closure (new scope)
      var _i = i;   // make a local copy of `i` from the outer scope
      t[i] = setTimeout( function(){x.value=_i*2+" seconds"}, i*2000 );
    })();
  }