使用jquery根据下拉选择来验证textarea

I'm using JQuery Validation plugin (http://jqueryvalidation.org) to validate an html form. I would like the textarea field to be required only if the dropdown menu selection value is 0. Any help would be great. Thanks in advance!Here's what the form looks like:<form name="reviewProduct" id="reviewProduct" method="POST"> <select id="reaction" name="reaction"> <option value="1">Yes. I like it.</option> <option value="0">No. I don't like it.</option> </select> <textarea id="explainwhy" name="explainwhy" rows="4"></textarea></form><script>$(document).ready(function () {$('#reviewProduct').validate({ rules: { explainwhy: { required: { depends: function () { return $('#reaction').val() == "0"; } } } }});});</script> 解决方案 Use the depends method to make the required rule "depend" upon a set of conditions.$(document).ready(function () { $('#reviewProduct').validate({ rules: { explainwhy: { required: { depends: function () { return $('#reaction').val() == "0"; } } }, reaction: { required: true } } });});DEMO: http://jsfiddle.net/SSA4Y/ 这篇关于使用jquery根据下拉选择来验证textarea的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！