OK, I already searched web pages, It was way over my head on the stuff I found. Can someone help me make a Hot key I think that is what I want. Not for sure if that is what I am looking for or not.

Here is what I would like it to do.

I want to press like (Ctrl E) any two keys will be fine this is just a sample.

What it will do is change a line of type from (width="800" height="400") to (width="576" height="288")

I will be online using firefox when this need to happen. This help me speed up some web posts I am doing. That way I won't need to edit that line in each post I am doing. When it find the line in the post it will just change it.

I need this info in a simple step by step for super dummy me.

Thanks in advance.