Get the iframe document object

gistfile1.txt

/ How to get the iframe document object
// Assume 'iframe' is a variable to the iframe DOM element
 
var iframe_document = null;
if (iframe.contentDocument) iframe_document = iframe.contentDocument;
else if (iframe.contentWindow) iframe_document = iframe.contentWindow.document;
else if (iframe.document) iframe_document = iframe.document;
else throw(new Error("Cannot access iframe document."));