javascript generate random number

Question

<!DOCTYPE html>
<html>

<body>
<p>Click the button to display a random number between 1 and 10.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
    var x = Math.floor((Math.random() * 10) + 1);
    document.getElementById("demo").innerHTML = x;
}
</script>
</body>
</html>

I created a html file on dreamweaver, but it said that I have error and I can't find the error, help!!!

What is it giving you as the error? The code works just fine. — RhapX, Jan 23 '15 at 02:18
Your code is flawless.. no error. If there is, can you post the error? — Dyrandz Famador, Jan 23 '15 at 02:22
Doesn't the Javascript debugger tell you which line the error is on? — Barmar, Jan 23 '15 at 02:23
dreamweaver display a message that there is a syntax error on line 1. — user3881958, Jan 23 '15 at 02:23
what is `it` that tells you such things? I think `it` is making it up ...works fine here http://jsfiddle.net/y9buepaL/ — charlietfl, Jan 23 '15 at 02:23
@user3881958 Good for you.. that should also work on dreamweaver but maybe there's something the dreamweaver required that you've missed.. but `sublime` also is great.. ;) — Dyrandz Famador, Jan 23 '15 at 02:42

score 1 · Answer 1 · answered Jan 23 '15 at 02:30

By using the W3C Validator at http://validator.w3.org/#validate_by_input I was able to see the validation error.

Copied from W3C.org:

 Line 4, Column 6: Element head is missing a required instance of child element title.

These errors will not affect the literal usability of your application but it is always a good idea to do your best to not have any validation errors in your HTML. I am not an HTML validation expert but if you do not have valid HTML, some browsers may not act as you designed.

I suggest you use the W3C.org validator often to verify your code.

I knew it.... Cool tool, I didn't know it existed. Upvote. – BillHaggerty Jan 23 '15 at 02:33 — BillHaggerty, Jan 23 '15 at 02:33

score 0 · Answer 2 · answered Jan 23 '15 at 02:44

0

in some old ver. IE, code need to like this:

<script><!--
function myFunction() {
    var x = Math.floor((Math.random() * 10) + 1);
    document.getElementById("demo").innerHTML = x;
}
//--></script>

answered Jan 23 '15 at 02:44

Walter

1
1

This is not necessary, and hasn't been for about a decade. See http://stackoverflow.com/questions/808816/are-html-comments-inside-script-tags-a-best-practice. – Jan 23 '15 at 04:30

javascript generate random number

2 Answers2