[JS] Get browser version using navigator object.

getBrowserVersion()

function getBrowserVersion()
{
    var findIndex;
    var browserVersion = 0;
    var browser = getBrowserName();

    browserVersion = navigator.userAgent;
    findIndex = browserVersion.indexOf(browser) + browser.length + 1;
    browserVersion = parseFloat(browserVersion.substring(findIndex, findIndex + 3));

    return browserVersion;
}