javascript - How do I inject a function declared in the parent page into an iframe, then call it? -


i can inject iframe this:

iframe.contentwindow.action...

however, if want send function declared within iframe, , call it?

e.g.

function hello(){...} iframe.contentwindow...

and both declare , call hello within iframe?

just clarify, hello's actions should done inside iframe. example, if put document.getelementbyid("input").value="foo"; inside hello , call inside iframe, changes should take effect inside input inside iframe , not in parent window.

insert script tag <head> section of frame code in it. script tag can either external script reference or inline script. have same origin in order injection.

var idoc = iframe.contentwindow.document; var script = idoc.createelement("script"); script.textcontent = 'document.getelementbyid("input").value="foo";' idoc.getelementsbytagname("head")[0].appendchild(script);

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