small but functioning impl of a promise

gistfile1.js

function w(){this.state=null;this.c={};this.result={value:null,pending:false};}
w.prototype.toState=function(state,result){this.state=state;if(this.c[state]){var l=this;setTimeout(function(){l.c[state](result)}, 0);}else{this.result.value=result;this.result.pending=12;}}
w.prototype.onState   = function(state,c){this.state=state;if(this.result.pending)this.toState(state,this.result.value   )   ;  }
function w5sec() {
    var l = new w();
    setTimeout(function(){l.toState("resolve",12);} , 5000)
    return l
}

w5sec().onState("resolve",function(value){console.log(value, "resolved" )  } )

small impl for a promise