When you are using <a> link and want to bind it with onclick event in stead of href location, it can be set to # as following
<a href="#" onclick="javascript:callMethod();">Link</a>
As you know setting href to “#some_id” is an approach used to link content inside the page so if you are using above approach, it will make the page jump to top which is not an elegant solution.
There is an alternate way which is much better as it does not make page jump.
<a href="javascript:void(0)" onclick="javascrit:callMethod();">Link</a>
Simple and elegant..