I am sorry.. Let me post this code and if you can edit it showing me how to use the onChange and the Others I would appreciate it. I am very new to Javascript. Thanks a bunch. Ohh, and I don't need one made for memory stick, I can make all the others myself if someone can show me how to use what Catalyst said.
<
HTML>
<HEAD>
</HEAD>
<BODY>
<SCRIPT LANGUAGE="JavaScript">
var hardDrive = 100;
var memoryStick = 200;
add = hardDrive + memoryStick;
document.write("$" + add);
</SCRIPT>
<SELECT NAME="hardDrive">
<OPTION VALUE="200">20 gig Hard Drive</OPTION>
<OPTION VALUE="300">40 gig Hard Drive</OPTION>
<OPTION VALUE="400">60 gig Hard Drive</OPTION>
<OPTION VALUE="500">80 gig Hard Drive</OPTION>
</SELECT>
</BODY>
</
HTML>