Main table border affects others?

[lo_volt]

Helllo, I'm creating a page in Dreamweaver, using tables. I have a main table that other tables/content is being put into. I want to give ONLY the main table a 5px border - this is no bother to do, but the result is, that it adds a border to any other tables that are in there. I've checked my code, these tables have 0px as border value yet they still display one when previewed in browser.

No doubt this is a simple fix, can someone tell me what I'm not checking? Thanks.

[jscheuer1]

If you add a border to a table, it is used by the table's cells as well. At least if you add it using the border attribute:

<table border="5">

However, if you add it using style:

<table style="border:5px groove white;">

Then it only applies to the outside of the table. If you are using the table selector in a style sheet:

table {
border:5px groove white;
}

That will affect all tables on the page.