[Андрей Параничев]

<script language="JavaScript">
function countit(form){
   var wordCount = form.phrase.value.split(' ').length;
   var price = parseFloat(form.pricePerWord.value) * wordCount;
   form.priceResult.value = price.toFixed(5);
   return false;
}
</script>
<form method="POST" onSubmit="return countit(this)" name="wordcount">
<input type="text" name="phrase" value="the .code inside" />
<input type="text" name="pricePerWord" value="0.003" />
<input type="text" name="priceResult" value="Результат" />
<input type="submit" />
</form>

ds [.code] опечатался, написал lenght вместо length.