如何在表单字段中放置随机生成的数字？

Question

Like this:

form:
title - [ ]
description - [ ]
password - [ ]

Don't want your own password?
[Generate one]

And then the [Generate one] button will just place a random number in the password field or whatever field desired.

How would I do this?

I was thinking that this would do it:

function generate() {
$placerand = rand();
}

and then place it in the 'value' of the form field.

<form>
<input type="text" value="<?php echo $placerand; ?>" placeholder="password">
<input type="submit" onclick="generate()" value="Generate a random number"><>
</form>

but, I'm thinking that the php function is a javascript function, so that wouldn't work... Would it?

Answer 1

Here is an example

<input type="Textbox" id="pwbx" />

<button OnClick="GetRandom()" type="button">generate</button>
<script>
    function GetRandom()
    {
        var myElement = document.getElementById("pwbx")
        myElement.value = Math.random()
    }
</script>