Change the way “src” calls the images

Using the add image feature, i’ve noticed it calls the images like this:

<src=”http://www.mysite.com/photos/photo.jpg&#8221; />

And even though it’s the normal thing to do, it is not friendly if at any time i change the url of the blog. That’s why i’ve been using this way before WP 2.5

<src=”../photos/photo.jpg” />

so i guess it could be solved by deleting the url each time, but maybe there is a way/hack to force WP to do the src calls like this by default

*Crossing my fingers for someone with the solution*

Thanks!!