how to set the url field to open in a new window as default?

how to set the url field to open in a new window as default?

Hi, in my appliclation i have a couple of url fields, when the users add a record on the list i dont want to let them coose the target of the link, i need the target set as new window as default, there is anyway to set this up?
The problem basicaly, is the kind of users i will have, the 99% of them wont have any idea about the new window / same window option, and if they by mystake choose same window, i will have a visual problem because my application will be embeded on another website, so i just want to avoid all of this and set all the links to be open on a new window always.

ty in advance.