<!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(){ //1.通过匹配div1的所有span后代元素 //$('.div1 span').html('test'); //2.匹配div元素的所有span元素 //$('div > span').html('test'); //3.匹配div紧邻的div元素 //$('.div1 + div').html('test'); //4.匹配div1紧邻的所有div元素 $('.div1 ~ div').html('test'); } } </script> </head> <body> <input type="button" id="btnok" value="匹配" /> <hr /> <div class="div1"> <span>第一个span标签噢</span> <div> <span>span元素，第一个div元素的后代元素</span> </div> </div> <div class="div2"> <span>第二个div的子元素</span> </div> <div class="div3">div3</div> </body> </html>