Hmm the title of the script you mentioned (DD Accordion) and the link point to two different scripts. Assuming the former, simply set the following line in red to false:
Code:
ddaccordion.init({
headerclass: "mypets", //Shared CSS class name of headers group
contentclass: "thepet", //Shared CSS class name of contents group
revealtype: "mouseover", //Reveal content when user clicks or onmouseover the header? Valid value: "click", "clickgo", or "mouseover"
mouseoverdelay: 200, //if revealtype="mouseover", set delay in milliseconds before header expands onMouseover
collapseprev: false, //Collapse previous content (so only one open at any time)? true/false
Bookmarks