Flash detection with JavaScript

flash_detect.js

var _flash_installed = false;
if (
    typeof navigator.plugins !== 'undefined' &&
    typeof navigator.plugins['Shockwave Flash'] === 'object'
) { _flash_installed = true; }

try {
    if (
        typeof navigator.mimeTypes !== 'undefined' &&
        (new ActiveXObject('ShockwaveFlash.ShockwaveFlash'))
    ) { _flash_installed = true; }
} catch (e) {
    _flash_installed = false;
}