Semua bidang yang dimasukkan JQuery mengaktifkan tombol kirim
//jQuery 1.6+ use:
$("#submitButtonID").prop('disabled', true); //disable
$("#submitButtonID").prop('disabled', false); //enable
//jQuery 1.5 and below use:
$("#submitButtonID").attr('disabled','disabled'); //disable
$("#submitButtonID").removeAttr('disabled'); //enable
Grepper