Online information system with continuous scrolling and position correction

1. A method comprising:

rendering a web page for display on a client device, wherein the rendered web page is based on a first web-page document, wherein rendering the web page involves first displaying text elements of the first web-page document and subsequently displaying one or more images of the first web-page document;

determining that the subsequent displaying of the one or more images has triggered a scroll position of the web page to change such that the scroll position is below a threshold scroll position; and

responsive to determining that the subsequent displaying of the one or more images has triggered the scroll position of the web page to change such that the scroll position is below the threshold scroll position, (i) requesting and receiving a second web-page document from a content server device, and (ii) re-rendering the web page for display on the client device, wherein the re-rendered web page includes content from the first web-page document and content from the second web-page document.

2. The method of claim 1 , wherein the threshold scroll position is 1000 pixels or less from the bottom of the rendered web page.

3. The method of claim 1 , wherein the first web-page document includes a plurality of selectable items corresponding to respective types of web page content, and wherein the content from the second web-page document is related to one of the selectable items.

4. The method of claim 3 , wherein the selectable items correspond to respective sections of an electronic version of a newspaper or a magazine.

5. The method of claim 1 , wherein rendering the web page for display on the client device comprises constructing a document object model representation of the first web-page document, and wherein re-rendering the web page for display on the client device comprises modifying the document object model representation to also represent at least some of the second web-page document.

6. The method of claim 1 , wherein re-rendering the web page for display on the client device comprises re-rendering the web page to represent the first web-page document followed by the second web-page document.

7. The method of claim 1 , further comprising:

displaying a first uniform resource locator (URL) associated with the first web-page document;

after re-rendering the web page for display on the client device, determining that the scroll position of the re-rendered web page has a particular characteristic; and

responsive to determining that the scroll position of the re-rendered web page has the particular characteristic, replacing the first URL with a second URL that is associated with the second web-page document.

8. The method of claim 1 , further comprising:

adding a first uniform resource locator (URL) associated with the first web-page document to a browsing history;

after re-rendering the web page for display on the client device, determining that the scroll position of the re-rendered web page has a particular characteristic; and

responsive to determining that the scroll position of the re-rendered web page has the particular characteristic, adding a second URL associated with the second web-page document to the browsing history, wherein the second URL follows the first URL in the browsing history.

9. An article of manufacture including a non-transitory computer-readable medium, having stored thereon program instructions that, upon execution by a client device, cause the client device to perform operations comprising:

rendering a web page for display on the client device, wherein the rendered web page is based on a first web-page document, wherein rendering the web page involves first displaying text elements of the first web-page document and subsequently displaying one or more images of the first web-page document;

determining that the subsequent displaying of the one or more images has triggered a scroll position of the web page to change such that the scroll position is below a threshold scroll position; and

responsive to determining that the subsequent displaying of the one or more images has triggered the scroll position of the web page to change such that the scroll position is below the threshold scroll position, (i) requesting and receiving a second web-page document from a content server device, and (ii) re-rendering the web page for display on the client device, wherein the re-rendered web page includes content from the first web-page document and content from the second web-page document.

10. The article of manufacture of claim 9 , wherein the threshold scroll position is 1000 pixels or less from the bottom of the rendered web page.

11. The article of manufacture of claim 9 , wherein the first web-page document includes a plurality of selectable items corresponding to respective types of web page content, and wherein the content from the second web-page document is related to one of the selectable items.

12. The article of manufacture of claim 9 , wherein rendering the web page for display on the client device comprises constructing a document object model representation of the first web-page document, and wherein re-rendering the web page for display on the client device comprises modifying the document object model representation to also represent at least some of the second web-page document.

13. The article of manufacture of claim 9 , wherein re-rendering the web page for display on the client device comprises re-rendering the web page to represent the first web-page document followed by the second web-page document.

14. The article of manufacture of claim 9 , wherein the operations further comprise:

displaying a first uniform resource locator (URL) associated with the first web-page document;

after re-rendering the web page for display on the client device, determining that the scroll position of the re-rendered web page has a particular characteristic; and

responsive to determining that the scroll position of the re-rendered web page has the particular characteristic, replacing the first URL with a second URL that is associated with the second web-page document.

15. The article of manufacture of claim 9 , wherein the operations further comprise:

adding a first uniform resource locator (URL) associated with the first web-page document to a browsing history;

after re-rendering the web page for display on the client device, determining that the scroll position of the re-rendered web page has a particular characteristic; and

responsive to determining that the scroll position of the re-rendered web page has the particular characteristic, adding a second URL associated with the second web-page document to the browsing history, wherein the second URL follows the first URL in the browsing history.

16. A client device comprising:

at least one processor;

data storage; and

program instructions, stored in the data storage, that upon execution by the at least one processor cause the client device to perform operations including:

rendering a web page for display on the client device, wherein the rendered web page is based on a first web-page document, wherein rendering the web page involves first displaying text elements of the first web-page document and subsequently displaying one or more images of the first web-page document;

determining that the subsequent displaying of the one or more images has triggered a scroll position of the web page to change such that the scroll position is below a threshold scroll position; and

responsive to determining that the subsequent displaying of the one or more images has triggered the scroll position of the web page to change such that the scroll position is below the threshold scroll position, (i) requesting and receiving a second web-page document from a content server device, and (ii) re-rendering the web page for display on the client device, wherein the re-rendered web page includes content from the first web-page document and content from the second web-page document.