set form empty jquery
$('#formId')[0].reset();
OR
// For jQuery 1.6+:
$(':input','#formId')
.not(':button, :submit, :reset, :hidden')
.val('')
.prop('checked', false)
.prop('selected', false);
// For jQuery < 1.6:
$(':input','#formId')
.not(':button, :submit, :reset, :hidden')
.val('')
.removeAttr('checked')
.removeAttr('selected');