XML-Squirrel Finder Question

I did read almost all the XML introduction tutorial . I made something like the squirrel finder by myself (http://www.kirupa.com/web/xml/examples/squirrelfinder.htm). All is ok but i got a question about this:

  
function DisplayInfo(){
menu_mc._visible=false;
infobox_mc._visible=true;
infobox_mc.content_txt.text=this.location_text;
}  

In the last sentence, what is “this”. Is that the item which is clicked by the mouse?. Im asking becouse when i did my own Xml dynamic menu that part caused me problems. Sorry for my ignorance, i hope you help me with this.