change text in popup

[Grisu74]

Hello could you please tell me how to change the text in this pop-up?

regards the minimum value in the width (200)

http://www.venezianeplisse.com/it/verticali-tende/colore-contract/tende-verticali-bande-127-mm-colore-contract-mono-comando-preventivo-acquista-detail.html

[attachment cleanup by admin]

[jjk]

I suppose you are using an istraxx plugin for this and I suppose (because I don't have that plugin) it's not supplied with an italian language file. In this case you probably have to translate the english ini file and place it into your italian frontend language folder.
If the plugin uses the jQuery validation engine, have a look at this: http://forum.virtuemart.net/index.php?topic=104621.msg350513#msg350513