ddaccordion.init({
headerclass: "category", //Shared CSS class name of headers group
contentclass: "thelanguage", //Shared CSS class name of contents group
revealtype: "click",
collapseprev: false, //Collapse previous content (so only one open at any time)? true/false 
defaultexpanded: [], //index of content(s) open by default [index1, index2, etc]
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: ["closedlanguage", "openlanguage"], //Two CSS classes to be applied to the header when it's collapsed and expanded, respectively ["class1", "class2"]
togglehtml: ["prefix", "<img src='css409/images_css409/closed409.gif' />", "<img src='css409/images_css409/opened409.gif' />"], //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"
})