checkbox复选框，如何让其勾选时触发一个事件，取消勾选时不触发

1. <input type="checkbox" οnclick="checkboxOnclick(this)" />
    
    
    
   <script>
    
    
    
   function checkboxOnclick(checkbox){
    
    
    
   if ( checkbox.checked == true){
    
    
    
   //Action for checked
    
    
    
   }else{
    
    
    
   //Action for not checked
    
    
    
   }
    
    
    
   }
    
    
    
   </script>