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<!DOCTYPE html> <html> <body> <img src="planets.gif" width="145" height="126" usemap="#planetmap"> <map name="planetmap"> <area id="venus" target="_blank" shape="circle" coords="124,58,8" alt="Venus" href="venus.htm-id=searchtest.html"> </map> <p>Click the button to change the querystring part of the href attribute for the "venus" area in the image-map.</p> <p><b>Tip:</b> Open the link and look in the address bar before and after you have clicked the "Try it" button, to see the effect.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("venus").search = "somenewsearchvalue"; document.getElementById("demo").innerHTML = "The querystring part was changed from 'searchtest' to 'somenewsearchvalue'."; } </script> </body> </html>