If you want to change them individually you can just do that on the page afterward like: style="width:100px"
The width attribute in the individual form elements would have to be changed manually.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.