und3x wrote:... can someone PM me and hep how to make injection in hacker stile because I use old stile hand work methods.
There's really no "hacker style" to meet here. There's simply more than one method of solving this.
You can use
a certain browser feature now present in all popular web browsers (a couple of years ago it required a separate browser plugin), or execute JavaScript, without touching any tools, that does the work for you, etc.
Whatever you can come up with to end up wherever you want to be (preferably without unwanted side effects in general).
These are all equally valid solutions.
You could even skip using a browser at all, but that'd be beyond what makes sense.
If I'm not mistaken, the method you are curious about is the no-tool one I mentioned above.
(Tip: Make sure your script does not have a return value as that'll overwrite your whole DOM)
Back in the day, the oldies (sorry guys, we're old AF, you'll have to live with it

) usually did it using either any of the aforementioned methods or... uhmm... let's put it this way: by downloading and editing
something locally (which I guess is what you referred to as "hand work methods" - shall we call it a handjob?

).
Sidenote: The "injection" everyone keeps and was talking about back then is actually not the proper name for the feature/technique, but if I gave you the right one, it'd give the whole thing away. Let's call it
Somethinglet.
PS.: AFAIK Firefox currently won't work. Not completely sure what's up with it, but it won't execute JS via our subject method. You can enable a certain setting I believe...
Let him who hath understanding reckon the number of the beast, for it is a human number: His number is 0x029A.