ddaccordion.init({ //top level headers initialization
        headerclass: "expandable", //Shared CSS class name of headers group that are expandable
        contentclass: "categoryitems", //Shared CSS class name of contents group
        collapseprev: true, //Collapse previous content (so only one open at any time)? true/false
        defaultexpanded: [], //index of content(s) open by default [index1, index2, etc]. [] denotes no content
        animatedefault: false, //Should contents open by default be animated into view?
        persiststate: true, //persist state of opened contents within browser session?
        toggleclass: ["", "openheader"], //Two CSS classes to be applied to the header when it's collapsed and expanded, respectively ["class1", "class2"]
        togglehtml: ["prefix", "", ""], //Additional HTML added to the header when it's collapsed and expanded, respectively  ["position", "html1", "html2"] (see docs)
        animatespeed: "normal", //speed of animation: "fast", "normal", or "slow"
        oninit:function(headers, expandedindices){ //custom code to run when headers have initalized
                ddaccordion.expandall('expandable')
                //do nothing
        },
        onopenclose:function(header, index, state, isclicked){ //custom code to run whenever a header is opened or closed
                //do nothing
        }
})

ddaccordion.init({ //2nd level headers initialization
        headerclass: "subexpandable", //Shared CSS class name of sub headers group that are expandable
        contentclass: "subcategoryitems", //Shared CSS class name of sub contents group
        collapseprev: true, //Collapse previous content (so only one open at any time)? true/false
        defaultexpanded: [], //index of content(s) open by default [index1, index2, etc]. [] denotes no content
        animatedefault: false, //Should contents open by default be animated into view?
        persiststate: true, //persist state of opened contents within browser session?
        toggleclass: ["opensubheader", "closedsubheader"], //Two CSS classes to be applied to the header when it's collapsed and expanded, respectively ["class1", "class2"]
        togglehtml: ["none", "", ""], //Additional HTML added to the header when it's collapsed and expanded, respectively  ["position", "html1", "html2"] (see docs)
        animatespeed: "normal", //speed of animation: "fast", "normal", or "slow"
        oninit:function(headers, expandedindices){ //custom code to run when headers have initalized
                //do nothing
        },
        onopenclose:function(header, index, state, isclicked){ //custom code to run whenever a header is opened or closed
                //do nothing
        }
})