<ul>
<li name="li1" sortid="nav_1">aaaaaaa</li>
<li name="li1" sortid="nav_2">bbbbbbb</li>
<li name="li1" sortid="nav_3">cccccccc</li>
<li name="li1" sortid="nav_4">ddddddd</li>
<li name="li1" sortid="nav_5">eeeeeee</li>
<li name="li1" sortid="nav_6">fffffffffffffffff</li>
<li name="li1" sortid="nav_7">gggggggg</li>
<li name="li1" sortid="nav_8">hhhhhhhh</li>
<li name="li1" sortid="nav_9">iiiiiiiiiiiiiiiiiii</li>
</ul>

//以sortid来遍历

$("li[sortid^='nav_']").each(function(i){
      var sortid=$(this).attr("sortid");

});

//以name来遍历

$("[name=li1]").each(function(a,b){
       var sortid= $(b).attr("sortid");
});

//如果已知某个sortid要取对象

$("[sortid='nav_1']").attr("html");
$("[sortid='nav_1']").attr("name");

//查找名字是clssId的文本对象

$("input[name='clssId']").val();


//查找id有一定规律的,例如查找dd标签中id=single_xxx

$("dd[id^=single_]").each(function(){
      var id = $(this).attr("id");
      alert(id.substring(7));
});