If you have an HTML HREF element just to use the onclick handler to launch a javascript function, make sure to add a "return false;" at the end of the onclick handler to prevent unwanted navigation. If the "return false;" is not specified, then after the handler is executed, the default action will be run, which is to navigate to the location specified in the "href=".
For example:
<a href="#" onclick="myfunction(); return false;">click me </a>
Alternatively, you could write the above line without the onclick mentioned. Then just put an event handler in your Javascript code.
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