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我有一个带有 __doPostBack 的 onfocus 事件,页面上有几十个左右的文本框。如果用户选项卡(tabkey)真的很快到达特定的文本框,它就会滞后,因为它试图填充每个 onfocus。有没有办法捕捉控件聚焦之间的延迟?