Making a pop up

[eluser]fedefrias[/eluser]
I dont comment that, it change when i copy paste it.
I see that error msg too. and i don`t know why it doesnt woork. Before in an other try i have put the javascript in the image page as you said as the ´common way´ to do it. The pop up apears but it doesn´t find the webpage that is the pop up is (when i open the pop up, i open another page with an image). There another 404 message apears too.
F.