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Our security manager dynamically inserts a bit of javascript at the top of every html page when a page is requested by the client. It is inserted above the DOCTYPE statement. I think this might be the cause of the layout problems I am having.
Ideas anyone?
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The doctype comes first The very first thing you should make sure to have in any HTML document you create is a DTD declaration.
A doctype declaration tells the browser that the page to be rendered is written in HTML. To declare an HTML5 doctype, `<! DOCTYPE html>` is required in the first line of your HTML document. Doctype declaration for HTML5 is not case sensitive and does not require a closing tag.
Definition and Usage All HTML documents must start with a <! DOCTYPE> declaration. The declaration is not an HTML tag. It is an "information" to the browser about what document type to expect.
The absence of the DOCTYPE or its incorrect usage will force the browser to switch to quirks mode. It means that the browser will do its best to layout the page that is considered to be old or created against web standards.
Yes, the DOCTYPE must come first.
The definition is here: http://www.w3.org/TR/REC-html40/struct/global.html. Note that it says a document consists of three parts, and the DTD must be first.
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