Add characters : Number Data Type « Language Basics « JavaScript DHTML

Add characters


<title>add characters test</title>

<script language="JavaScript">

function myCalc(){

  var myLetters = new Array(" ", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", 
                            "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", 
                            "v", "w", "x", "y", "z");
  var myNumbers = new Array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 
                            16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26);
  var myPreAddends = document.myForm.myInput.value;
  var myLowerCase = myPreAddends.toLowerCase();
  var mySum = 0

  for(i=0; i<myLowerCase.length; i++) {
  myAddend = myLowerCase.charAt(i);
  for (x=0; x<myLetters.length; x++) {
    if (myAddend == myLetters[x]) {
    myAddend = myNumbers[x];
  mySum=mySum + myAddend

  document.myForm.myResult.value = mySum;


function checkLength() {
  var InputCheck = document.myForm.myInput.value
  if (InputCheck.length > 15) {
  alert('Only 15 characters please!');





<form name="myForm" onsubmit="myCalc(); return false;">
    <p>Please enter up to 15 letters (words, phrases, etc):
    <input name="myInput" onkeyup="checkLength()">

    <input type="submit" value="Calculate!" name="submit">
        If a=1, b=2, c=3, etc, then your letters add up to:<br>
    <input name="myResult">




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