将CSS属性添加到jQuery

我需要ID为“container”的div,以便在激活click函数时设置CSS属性.我需要一个溢出：隐藏设置为#container.

这是我的剧本.

$(function() {
    $(".folderContent").hide();

    $(".signin").click(function(event) {
        var folderContent = $(".folderContent");


        var folderContentShown = folderContent.css("display") != "none";

        var clickedFolder = $(this);
        clickedFolder.parent("#signincontainer").after(folderContent);

        $("body").find("#container").not(clickedFolder).each(function() {
            if (!folderContentShown) $(this).not("#signincontainer").animate( {
                opacity: 0.50
            },"slow");
            else $(this).animate({
                opacity: 1.00
            },"slow");
        });

        //clickedFolder.animate({opacity: folderContentShown ? 1.00 : 0.70},"fast");
        folderContent.slideToggle();
        event.preventDefault();
    });
});