ddaccordion.init({
        headerclass: "level2-expandable", //Shared CSS class name of headers group that are expandable
        contentclass: "level2-items", //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: false, //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: "fast", "normal", or "slow"
      });
      ddaccordion.init({
        headerclass: "level3-expandable", //Shared CSS class name of headers group that are expandable
        contentclass: "level3-items", //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: false, //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: "fast", "normal", or "slow"
      });