本文实例分析了jQuery的层级查找方式。分享给大家供大家参考，具体如下：
下面使用jquery的层级查找方式
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <script src="jquery-1.6.2.min.js" type="text/javascript"></script> <script type="text/javascript"> $(document).ready( function(){ /*第一种方式层级查找,查找的是a标签对象——选择器*/ $('.thumb-hover a:has(img)').each(function(){ alert($(this).attr("pid")); }); /*第三种层级查找，使用方法进行筛选——筛选器*/ $('.thumb-hover a').has("img").each(function(){ alert($(this).attr("pid")); }); /*第二种方式层级查找，查找的是img标签对象——基本层级选择器*/ $('.thumb-hover a img').each(function(){ alert($(this).attr("alt")); }); } ); </script> <title>无标题文档</title> </head> <DIV class=thumb sizcache="17" sizset="84"> <SPAN class=thumb-hover sizcache="17" sizset="84"> <A class=lightbox-enabled href="/user/showuser.php?uid=u1373373094&tab=photo&view=photo_detail&pid=72464692#detail" target=_blank pid="72464692" oid="27" src="http://pic03.babytreeimg-dev.com/foto3/thumbs/2012/0106/43/8/51dc02a6279c0ef6c728e5_mb.jpg" jQuery1640004568396895048288="1"> <IMG alt=DSC_0723.JPG src="http://pic05.babytreeimg-dev.com/foto3/thumbs/2012/0106/43/8/51dc02a6279c0ef6c728e5_sm.jpg"> </A> <SPAN id=72464692 class=mouse-wrap> <IMG class=unselect src="http://pic.babytree.com/img/mybabytree/photo/pix.png"> </SPAN> </SPAN> </DIV> <DIV class=thumb> <SPAN class=thumb-hover sizcache="0" sizset="2"> <A class=lightbox-enabled href="/user/showuser.php?uid=u3073373044&tab=photo&view=photo_detail&pid=72464732#detail" target=_blank pid="72464732" oid="5" src="http://pic02.babytreeimg-dev.com/foto3/thumbs/2012/0216/48/9/b72ff3742c8c172650a0d1_nb.jpg" jQuery16405726906849340585="1"><IMG alt=Koala.jpg src="http://pic01.babytreeimg-dev.com/foto3/thumbs/2012/0216/48/9/b72ff3742c8c172650a0d1_sm.jpg"> </A> <SPAN id=72464732 class=mouse-wrap> <IMG class=unselect alt=DSC_0724.JPG src="http://pic.babytree.com/img/mybabytree/photo/pix.png"> </SPAN> </SPAN> </DIV> <body> </body> </html>
希望本文所述对大家jQuery程序设计有所帮助。