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copied!<blockquote> <p>if the document.domain property is set in the parent page, Internet Explorer gives me an "Access is denied"</p> </blockquote> <p>Sigh. Yeah, it's an IE issue (bug? difficult to say as there is no documented standard for this kind of unpleasantness). When you create a srcless iframe it receives a <code>document.domain</code> from the parent document's <code>location.host</code> instead of its <code>document.domain</code>. At that point you've pretty much lost as you can't change it.</p> <p>A horrendous workaround is to set <code>src</code> to a javascript: URL (urgh!):</p> <pre><code> iframe.src= "javascript:'<html><body><p>Hello<\/p><script>do things;<\/script>'"; </code></pre> <p>But for some reason, such a document is unable to set its own <code>document.domain</code> from script in IE (good old “unspecified error”), so you can't use that to regain a bridge between the parent(*). You <em>could</em> use it to write the whole document HTML, assuming the widget doesn't need to talk to its parent document once it's instantiated.</p> <p>However iframe JavaScript URLs don't work in Safari, so you'd still need some kind of browser-sniffing to choose which method to use.</p> <p>*: For some other reason, you <em>can</em>, in IE, set <code>document.domain</code> from a second document, document.written by the first document. So this works:</p> <pre><code>if (isIE) iframe.src= "javascript:'<script>window.onload=function(){document.write(\\'<script>document.domain=\\\""+document.domain+"\\\";<\\\\/script>\\');document.close();};<\/script>'"; </code></pre> <p>At this point the hideousness level is too high for me, I'm out. I'd do the external HTML like David said.</p>

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