Access Form Fields within an IFRAME Across Different Domains

Looking for a solution to detect input in the FirstName field outside of an iframe on my HTML page. The URL loaded in the iframe cannot be controlled. Is there a way to achieve this using JSON or JavaScript?

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>

<body>
First Name : 
<input name="ApplicantInfo1$FirstName" type="text" maxlength="30" id="ApplicantInfo1_FirstName" title="First Name" class="nonnumeric" minlength="2" style="width:200px;" /> 
<br />
<iframe id="progressive" src="https://www.progressivelp.com/onlineapplication/onlineapplication.aspx?sid=Metro2674957490&kid=1" width="940" height="1200" scrolling="no" style="border:none;"></iframe>
</body>
</html>
javascriptjsoniframe

Answer №1

Browsers have a strict same-origin policy in place for security reasons.

This rule prevents malicious websites from accessing sensitive information from other domains, such as your online banking details. By restricting cross-domain data access, the same origin policy (SOP) helps protect users' confidential information.

To bypass this restriction, a commonly used method is to set up a proxy page on your server. This intermediary page can fetch remote content and pass it back to the browser, ensuring that both pages originate from the same domain.

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