I think my code is pretty correct, but the only thing which could be wrong is the requirement, and it is so confusing because it doesn't give more test cases for what exactly is a right output. Need help, thx guys. My understanding is the information splits with & and will output the first line before "=", then alert(substring after "=" and before next "&" like 1v1=15 , which 1v1 will be the first line).