I need help, I don't understand anything about jQuery, but I want implement this code: DEMO: http://jsfiddle.net/urbanist/HVfaA/261/

I want to do something like this (open work in the portfolio): http://www.jdetraz.com/#3

this guy uses this, i think:

$(".close_project").click(function () {
{
$("div.focus_project").slideUp("slow");
$("#select_project a").removeClass("active");
}
});
$("#project1").click(function () {
if ($("div.current").is(":visible")) {
$("div.current").slideUp("slow", function() {
$("div.current").removeClass("current");
$("#select_project a").removeClass("active");
$("#longines").slideDown("slow", function() {
$("#longines").addClass("current");
$("#select_project a#app_longines").addClass("active");
});
});
}
else {
$("#longines").slideDown("slow", function() {
$("#longines").addClass("current");
$("#select_project a#app_longines").addClass("active");
});
}
}); 

When div #one or #two, ecc.., is clicked, they open in the same div. And this it's ok. But I don't know how to assign in the right way -slideUp()- to the div that assigned -slideDown()- without it closes. I don't think that using -slideToggle()- is correct. Maybe I need to change class, but I don't know how to do this too.

Sorry for my English, I thank you all in advance.