html - How does Google change the urls in search result page -


if search in google (e.g. stackoverflow), in search result page can see stackoverflow item result.

when hover mouse in stackoverflow item browser shows it's anchor element refers stackoverflow.com . when right click on item , click on copy link address url this .

how google it?

<a id="changeme" href="http://foo.com">click me</a>

as mentioned in comments guess simple as:

$('#changeme').mousedown(function(){   $(this).attr('href', "http://bar.com")   });

http://jsfiddle.net/jpkl6/


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