Calling Ajax

$(function(){
 getMailTypeText();
    $('select#procedure_mail_template_mail_type_id').live('change', function(){
     getMailTypeText();
    });
});

function getMailTypeText(){
 $.ajax({
        url: $('input#getMailTypeText').val(),
        data: { mail_type_id:  $('select#procedure_mail_template_mail_type_id').val()},
        dataType: 'json',
        success: function(xhr){
   $('div#mail_type_text').html(xhr["text1"]);
        }
    });
}