I just found a nice script you can see it over herehttp://demo.tutorialzine.com/2012/10/css3-dropdown-menu/I saw the drop down has a little ^ on top. On the css I could find this:\[code\]#colorNav li ul li:first-child:before{ content:none; position:absolute; width:1px; height:1px; border:5px solid transparent; border-bottom-color:#313131; left:50%; top:-10px; margin-left:-5px;}\[/code\]Only I can't understand how this is working; does it havesomething to do with the border?