<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> <script src="js/jquery.js"></script> <script> window.onload = function(){ document.getElementById('btnok').onclick = function(){ //提示：disabled="true" 和 readonly="readonly" 的区别在于readonly是可以在后端接收的 //1.匹配所有不可用元素 //$('input:disabled').val('不可用元素') //2.匹配所有下拉选中元素 alert($('option:selected').val()); } } </script> </head> <body> <input type="button" id="btnok" value="匹配" /> <hr> <form> name:<input type="text" id="username" disabled="true" /> <hr/> name2:<input type="text" id="username" readonly="readonly" /> <hr /> pass:<input type="password" id="pass" /> <hr /> like:<select> <option value="-1">请选择</option> <option value="1">足球</option> <option value="2">篮球</option> <option value="3">兵乓球</option> <select> <hr /> 个人简介：<textarea cols="40" rows="5"></textarea> <input type="submit" value="submit" /> </form> </body> </html>