New post problems

I am having issues trying to post new content using my WP… everytime I click on Write > Post, the browser hangs, stals and freezes. Sometimes it gives me this error message “A script on this page may be busy or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete“

I have checked the source of that page (the post-new.php page) and I have found some codes that do not seem normal… for example, below is just a chunk of code that just seems to repeat and repeat nonstop, overloading the page and I am almost certaing that it is the reason my my problems.. anyone knows how to fix this? The code has to do with Ajax, I think…

[Moderated: Too much code. Please consider placing the code in a text file on your site with a link here -or- use a pastebin service such as https://wordpress.pastebin.ca. Thanks!]