Isn't there a javascript for . . .

[mordie]

. . . removing the dotted selection box that surrounds a selected image or link immediately after the selected object is clicked.

What is it called and where would I find it?

[SpaceFrog]

onfocus="this.blur()"

[Bernard Marx]

That code will make links inaccessible for people that need to navigate using tabs.

[Rambo Tribble]

Yes, to do the deed after the click event has the chance to be registered by various means, simply end your onclick-called functions, methods, or whatever with

this.blur();

rather than calling it as soon as focus is gained.