Forum Moderators: not2easy
As you are using Dreamweaver (and I'm guessing design view) You can select a table cell and use the properties panel to select a background colour or image. If you use a backgound colour there will be no gradient, with a repeating background image you could create a fade from one hue to another.
Rounded corners are a different story and can also be done in many ways. The Dreamweaver hack to make nested tables and house gifs in the top and bottom corners. not elegant. Or you could place a rectangular gif with rounded corners to no-repeat as a background image in the cell - quick and simple but heavy on bandwidth.
I think CSS is the tool for these jobs - goole "css rounded corners" and you'll see what I mean. Using Cascading Style sheets for your background image and for table background styles is far more elegant too + they'll expand and contract with you content.