How do I write a Regular Expression to match any three digit number value?

Question

I'm working with some pretty funky HTML markup that I inherited, and I need to remove the following attributes from about 72 td elements.

sdval="285" 

I know I can do this with find/replace in my code editor, except since the value of each attribute is different by 5 degree increments, I can't match them all without a Regular Expression. (FYI I'm using Esspress and it does support RegExes in it's Find/Replace tool)

Only trouble is, I really can't figure out how to write a RegEx for this value. I understand the concept of RegExes, but really don't know how to use them.

So how would I write the following with a Regular Expression in place of the digits so that it would match any three digit value?

sdval="285" 

Answer 1

/sdval="\d{3}"/ 

EDIT:

To answer your comment, \d in regular expressions means match any digit, and the {n} construct means repeat the previous item n times.