$(document).ready(function(){
  
    $("#sidebox").accordion({
	event: "mouseover",
    header: "a.accordion-link",
	active: "a#ShowFirst",//#ShowFirst id goes on link you want to display by default when page is first opened
	autoHeight: false,
    icons: { 
        header: "no_arrow",
        headerSelected: "no_arrow"
    }	
	});

});