jquery - How to inherit Class in javascript? -

the function not working, not putting values in "input".

function example(id){     this.code= function(){$('.'+id).val(id)}     this.validate= function (){         $('.'+id).keyup(function (e){             if(e.keycode==13) this.code();         })     } } 

body

<input type="text" class="test"/> <input type="text" class="test1"/> <script type="text/javascript">     var test= new example('test')     var test1= new example('test1')     test.validate()     test1.validate() </script> 

your keyup event handler have different "this". can use bind correct problem

keyup(function (e){ if(e.keycode==13) this.code(); }.bind(this)) 

when bind event, handler called "this" keyword set object fired event, not object created event.