This is one of the simplest methods I know of:
http://www.javascript-coder.com/html...rm-email.phtml
It would help though if we knew what the webserver is running.. (IIS, Apache, etc) as each webserver has it's own in-built mail scripts. Also, what scripting language is your developer using if at all.. I presume he's trying to use plain html if he's not a coder?