这个错误出现在哪一行？

What line is this error occurring on?

什么行是否发生此错误？

What line is this error occurring on?

它位于javascript代码行32中，我正在尝试为parentdiv创建一个对象，然后删除该div的子节点。

it is in the javascript code line 32 where i am trying to make an object for the parentdiv and then remove the child node of that div.

为什么txtHint+0？为什么不txtHint0？

Why "txtHint"+0? Why not "txtHint0"?