Error with Ajax true Failed to execute 'write' on 'Document'

[chiqui3d]

Error:

Failed to execute 'write' on 'Document': It isn't possible to write into a document from an asynchronously-loaded external script unless it is explicitly opened

This happens when I activate the Ajax option, since in the other way to make the page have a delay in loading, and I need to do it by AJAX, some solution for this?