Not just HTML, you need a bit of CSS as well. It's easy to pull off so there's only a small amount of code for this. Take a look at the following website:
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Also,
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It is definately feasable through just html and is infact supported by all major browsers:

img src="example.png"
onmouseover="this.src='example2.png'"
onmouseout="this.src='example.png'"

of cource add "<" and ">" on the start and end. As I can't seem to reply with html code?

iyop45 wrote It is definately feasable through just html and is infact supported by all major browsers:

img src="example.png"
onmouseover="this.src='example2.png'"
onmouseout="this.src='example.png'"

of cource add "<" and ">" on the start and end. As I can't seem to reply with html code?

I believe that is deprecated.

Unless "orangutan123" is specifically being judged on the clarity of his code, the way on which it's written doesn't matter.

It follows the same functions and is recognized by all major browsers ( go ahead correct me if I'm wrong ).
orangutan123 was looking for a method to perform a function through html- I provided the basis of such.
So why the critisism, its not bad practice -for a basic understanding- using this method.

iyop45 wrote It is definately feasable through just html and is infact supported by all major browsers:

img src="example.png"
onmouseover="this.src='example2.png'"
onmouseout="this.src='example.png'"

of cource add "<" and ">" on the start and end. As I can't seem to reply with html code?

Technically, it is HTML and Javascript, so if a user has Javascript disabled the "onmouseover" and "onmouseout" events will not work.

But the method works though, no argument there :bigups:

Could you not use the ':hover' pseudo tag?