form.html

[#assign src = ""]

[#if configuration.src == "custom"]
  [#if configuration.customSrc?starts_with("{")]
    [#assign customSrcJson = jsonFactoryUtil.createJSONObject(configuration.customSrc)]

  	[#if customSrcJson[locale]?has_content]
  		[#assign src = customSrcJson[locale]]
  	[#elseif customSrcJson["default"]?has_content]
  		[#assign src = customSrcJson["default"]]
		[/#if]
  [#else]
    [#assign src = configuration.customSrc]
	[/#if]
[#else]
	[#assign srcJson = jsonFactoryUtil.createJSONObject(configuration.src)]

	[#if srcJson[locale]?has_content]
		[#assign src = srcJson[locale]]
	[#else]
		[#assign src = srcJson["default"]]
	[/#if]
[/#if]

<div class="fragment_263944053" data-parent-test="parent-test-1">
	<iframe src="${src}?param1=test-1" width="100%" height="500" type="text/html" onload="console.log(document.getElementById('854303_15295pi_854303_15295')); document.getElementById('854303_15295pi_854303_15295').value='my value'" data-test="test-1" frameborder="0" allowTransparency="true" style="border: 0"></iframe>
</div>