I just made this, is this what you mean?
(insert in BODY area)
<p>Item Price <input type="text" name="price" size="20"></p>
<p>Qty <input type="text" name="quant" size="20"></p>
<p>Total <input type="text" name="text1" size="20"></p>
<script>
function calc(){
text1.value = price.value * quant.value
setTimeout("calc()",100);
}
setTimeout("calc()",100);
</script>
cr3ative