Making a button that, on click, prints 20 possible combinations, need some help.

**cout << "Linus"** · 05-12-2016, 02:52 AM

Code:

<button onclick="FFBBLLRRUUDD()">Click me</button>

<p id="36"></p>

<script>
function FFBBLLRRUUDD() {
    var num = 36
    var n = num.toString();
    Math.random().toString(36).replace(/("F", "F'", "B", "B'", "L", "L'", "R", "R'", "U", "U'", "D", "D'")+/g, '').substr(0, 20).innerHTML = n;
}

**jmrker** · 05-12-2016, 03:29 AM

Different approach entirely.

Note: ID values must not start with a number.

Code:

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />

<title> HTML5 page </title>

</head>
<body>
<button onclick="document.getElementById('p36').innerHTML=FFBBLLRRUUDD()">Click me</button>

<pre id="p36"></pre>

<script type="text/javascript">
function FFBBLLRRUUDD() {
  var fblrud = ['F','B','L','R','U','D'];
  var str = '', n=0;
  for (var i=0; i<20; i++) {
    n = Math.floor(Math.random()*fblrud.length);
    str += fblrud[n];
  } return str;
}

</script>

</body>
</html>

**Dormilich** · 05-12-2016, 08:14 AM

see also How could i make a jscript button for a letter generator?

Note: ID values must not start with a number.

only before HTML5. now the only constraint is that there is no whitespace character.

**felgall** · 05-12-2016, 10:45 PM

Originally Posted by Dormilich

only before HTML5. now the only constraint is that there is no whitespace character.

of course that only guarantees that they will work in the HTML. The JavaScript standard is completely separate and so there is at least the possibility of situations where JavaScript can't handle one that HTML can.

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