Find broken images in page & image replace by another image

Question

Hi I am using selenium webdriver 2.25.0 & faceing the some serious issues,

1. how to find broken images in a page using Selenium Webdriver
2. How to find th

Answer 1

The next lines are not optimized, but they could find broken images:

List imagesList = _driver.findElements(By.tagName("img"));
for (WebElement image : imagesList)
{
    HttpResponse response = new DefaultHttpClient().execute(new HttpGet(image.getAttribute("src");));
    if (response.getStatusLine().getStatusCode() != 200)
        // Do whatever you want with broken images
}

Regarding your second issue, I think I didn't understand it correctly. Could you explain it with more detail?