A user will either hit the stop button, close the browser, or click on a link before the page loads. 500 Internal Error Couldn't retrieve the HTML document because of server-configuration problems. Keep trying until the page loads. 503 Service Unavailable Server busy, site may have moved ,or you lost your dial-up Internet connection. No Data Page is there but is not showing anything.
Error occurs in the document.
Attributed to bad table formatting, or stripped header information. Bad File Request Browser may not support the form or other coding you're trying to access. The Domain Name Server can't translate your domain request into a valid Internet address. Server may be busy or down, or incorrect url was entered. Host Unavailable Host server down.