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
            revealtype: "mouseover", //Reveal content when user clicks or onmouseover the header? Valid value: "click" or "mouseover
            mouseoverdelay: 600, //if revealtype="mouseover", set delay in milliseconds before header expands onMouseover
            collapseprev: true, //Collapse previous content (so only one open at any time)? true/false
            defaultexpanded: [0], //index of content(s) open by default [index1, index2, etc]. [] denotes no content
            onemustopen: false, //Specify whether at least one header should be open always (so never all headers closed)
            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: "fast", //speed of animation: integer in milliseconds (ie: 200), or keywords "fast", "normal", or "slow"
            oninit:function(headers, expandedindices){ //custom code to run when headers have initalized
            //do nothing
            },
            onopenclose:function(header, index, state, isuseractivated){ //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
            revealtype: "mouseover", //Reveal content when user clicks or onmouseover the header? Valid value: "click" or "mouseover
            mouseoverdelay: 600, //if revealtype="mouseover", set delay in milliseconds before header expands onMouseover
            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
            onemustopen: false, //Specify whether at least one header should be open always (so never all headers closed)
            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: "fast", //speed of animation: integer in milliseconds (ie: 200), or keywords "fast", "normal", or "slow"
            oninit:function(headers, expandedindices){ //custom code to run when headers have initalized
            //do nothing
            },
            onopenclose:function(header, index, state, isuseractivated){ //custom code to run whenever a header is opened or closed
            //do nothing
            }
        })