generate random string for div id

Question

I want to display YouTube videos on my website, but I need to be able to add a unique id for each video that\'s going to be shared by users. So I put this toget

Answer 1

A edited version of @jfriend000 version:

    /**
     * Generates a random string
     * 
     * @param int length_
     * @return string
     */
    function randomString(length_) {

        var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghiklmnopqrstuvwxyz'.split('');
        if (typeof length_ !== "number") {
            length_ = Math.floor(Math.random() * chars.length_);
        }
        var str = '';
        for (var i = 0; i < length_; i++) {
            str += chars[Math.floor(Math.random() * chars.length)];
        }
        return str;
    }