防止表单重复提交的八种简单有效的策略
http://blog.csdn.net/myhuashengmi/article/details/52694077
$("input").attr(\'readonly\', true);
$("textarea").attr(\'readonly\', true);
$(\':radio\').attr(\'disabled\', true);
$(\':checkbox\').attr(\'disabled\', true);
$(\':button\').attr(\'disabled\', true);
$(\'a\').removeAttr(\'onclick\');
$(\'select\').attr(\'disabled\', true);