Attribute for `<IFRAME ...>`
`SRC ="URL"`

SRC indicates the URL of the document which should go in the frame.

this code produces this

<IFRAMe SRC="hello.html" WIDTH=250 HEIGHT=100> If you can see this, your browser doesn't understand IFRAME. However, we'll still <A HREF="hello.html">link</A> you to the file. </IFRAME>
If you can see this, your browser doesn't understand IFRAME. However, we'll still <A TARGET="_top" HREF="hello.html">link</A> you to the file.

<IFRAME WIDTH="..."> >>>

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this code	produces this
<IFRAMe SRC="hello.html" WIDTH=250 HEIGHT=100> If you can see this, your browser doesn't understand IFRAME. However, we'll still <A HREF="hello.html">link</A> you to the file. </IFRAME>	If you can see this, your browser doesn't understand IFRAME. However, we'll still <A TARGET="_top" HREF="hello.html">link</A> you to the file.

Attribute for <IFRAME ...> SRC ="URL"

Attribute for `<IFRAME ...>`
`SRC ="URL"`