请检查js小提琴 - http://jsfiddle.net/7f304y52/ 虽然正确的文档类型被放置,但为什么框架集不工作?你能解释一下在页面崩溃或元素被丢弃 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
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我不能修复这个错误: Unable to Determine Parse Mode!
The validator can process documents either as XML (for document types such as XHTML, SVG, etc.) or SGML (for HTML 4.01 and prior versions). For this docume