how to send form input in json not in form submit

[azizkhani]

i have a form and send data by json and ajax but when i use easy ui form data send by application/form not application/json
and server raise exception how can id do it ?
plz help me

[stworthy]

To submit a form, just call the 'submit' method of form.

Code:

$('#ff').form('submit',{
  url:...,
  success:function(result){
    console.log(result);
  }
});

[azizkhani]

To submit a form, just call the 'submit' method of form.

Code:

$('#ff').form('submit',{
  url:...,
  success:function(result){
    console.log(result);
  }
});

i want to chage this parameter

type : 'DELETE',
dataType : 'json',
contentType : 'application/json; charset=utf-8'


how can do it?