Calculations / Multi Forms Etc

I got the following code running on a seperate page but how could I do it without forms? the page I wish to put it on page is one big form and therefore nested forms are a no no.

<script>
function calc() {
var inp = document.ccForm.inpt.value
var inp2 = document.ccForm.inpt2.value
var outp = 0
outp = inp * inp2
document.ccForm.outpt.value = outp
}
</SCRIPT>

<FORM ACTION="#" NAME="ccForm">
<INPUT TYPE=TEXT NAME="inpt" SIZE=10 VALUE="2.9" ONCHANGE="calc()">
<INPUT TYPE=TEXT NAME="inpt2" SIZE=10 VALUE="2.9" ONCHANGE="calc()">
<INPUT TYPE=TEXT NAME="outpt" SIZE=10 DISABLED>
</FORM>