无法通过类和数字ID选择jquery元素

Question

$(".associated_requests")
[<div class=?"associated_requests" id=?"0">?</div>?, 
<div class=?"associated_requests" id=?"1">?</div>?, 
<div class=?"associated_requests" id=?"2">?</div>?, 
<div class=?"associated_requests" id=?"3">?</div>?]

$(".associated_requests#0")
[]

我在语法上做错了吗？看这里似乎应该是可能的.

编辑:以下也失败:

$(".associated_requests #0")
[]
$("#0 .associated_requests")
[]
$("#0.associated_requests")
[]

Answer 1

在HTML5之前,ids不能以数字开头.将其更改为以字母开头.即item0,item1,item2等等.