HTML anchor tag with Javascript onclick event
If your onclick function returns false the default browser behaviour is cancelled. As such:
<a href='http://www.google.com' onclick='return check()'>check</a>
<script type='text/javascript'>
function check()
{
return false;
}
</script>
Either way, whether google does it or not isn't of much importance. It's cleaner to bind your onclick functions within javascript - this way you separate your HTML from other code.
You can even try below option:
<a href="javascript:show_more_menu();">More >>></a>