[jQuery] prevent more than one submit in ajaxsubmit

[jQuery] prevent more than one submit in ajaxsubmit


Guys I need some litle help.
var v = jQuery("#send_form").validate({
.....
......
....
},
submitHandler: function(form) {
jQuery(form).ajaxSubmit({
dataType: "json",
success: process_result
});
}
});
how i can prevent or hide or disable the submit button or it behaviour
when the first submit happend?