Last Saturday Lions fans were calling for manager Lomas to be sacked after the 5-1 home capitulation against Derby - their sixth game without a win.
But fast-forward a week and Lomas and his side were applauded off the pitch having followed up Tuesday's maiden victory over Blackpool with a 1-0 derby-day success.
"That was the aim after Tuesday," said Lomas.
"These are knowledgeable fans and when the lads give that level of commitment and pride for the shirt then they will back you.
"Everyone was on a downer after the Derby game and rightly so.
"But the lads have done their job well and that's satisfying."
Scott McDonald was the hero with his first goal since joining Millwall from Middlesbrough over the summer, although he got a big slice of luck with his 37th-minute strike.
Charlton goalkeeper Ben Hamer was already diving to his right to keep out McDonald's speculative 25-yard drive when it flicked off defender Dorian Dervite and rolled inside the keeper's left-hand post.
The result meant Millwall, who were rock-bottom seven days ago, leapfrogged their south London rivals in the table.
"I'm pleased for Scott," added Lomas. "We probably ask him to play slightly out of position on the left, but it worked a treat.
"He got a bit of luck with the deflection, but he earned it.
"It's the first Sunday in a while I'll have a coffee and read the papers."