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Add numeric values together

How do I add numeric values dynamically without hitting the 'Submit' button? (version 1) by GUJUm0deL
Posted: 11 May 07 (Edited 11 May 07)

<script language="javascript" type="text/javascript">
function addd() {
  document.addem.input1.value= ""
  document.addem.input2.value= ""
}

function addthem() {
    //FIRST INPUT VALUE
    var add1 = document.addem.input1.value
    var add1 = parseFloat(add1, 10)
    add1 = (isNaN(add1))?0:add1;

    //SECOND INPUT VALUE
    var add2 = document.addem.input2.value
    var add2 = parseFloat(add2, 10)
    add2 = (isNaN(add2))?0:add2;
    
    //ADD THEM TOGETHER
    return eval(add1) + eval(add2);
}

function addition() { document.addem.answer.value = addthem() }
// -->
</script>

<form name="addem">
    <table border="0" cellpadding="2">
        <tr><td colspan="3"><p>Enter any number.  Numbers get added up upon every move.  Fields can be left blank!!</p></td></tr>
        <tr>
            <td>add: <input type="TEXT" name="input1" onChange="addition(addem)" size="20" maxlength="10"></td>
            <td>add: <input type="TEXT" name="input2" onChange="addition(addem)" size="20" maxlength="10"></td>
            <td>answer: <input type="TEXT" name="answer" onFocus="this.blur();" size="20" maxlength="10"></td>
        </tr>
    </table>
</form>

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