alert(document.getElementById('header').src)<br>
document.getElementById('header').removeAttribute('src')
<br> document.getElementById('header').removeAttribute('srcdoc')
<br>document.getElementById('header').src = 'https://nebula.inject0r.repl.co/service/go/hvtrs8%2F-ccntaq.knqtpuatwrg.aoo%2Faowrqeq%2F78%3B2740'