$("

", {

    src: image_url,
    alt: image_description,
    className: "translucent_image",
    click: function() { $(this).css("opacity", "50%"); }
});

// Shrink the height of all images to 0

$("img").animate({ height: 0 });

$("#sprite").animate({
    opacity: .25,      // Animate opacity to .25
    font-size: 10      // Animate font size to 10 pixels
}, {
    duration: 500,     // Animation lasts 1/2 second
    complete: function() {    // Call this when done
        this.text("Goodbye"); // Change element text.
    } 
});

$("p").animate({
    "margin-left": "+=.5in", // Increase indent
    opacity: "-=.1"          // And decrease opacity
});

// Hide images, as with the hide() method, but animate
// the image size linearly while the opacity is being
// animated with the default "swing" easing function.

// Use the specialEasing option
$("img").animate({
                    width:"hide",
                    height:"hide",
                    opacity:"hide"
                 },{
                    specialEasing: {
                       width: "linear",
                       height: "linear"
                    }
                 });

// Or pass [target value, easing function] arrays
$("img").animate({
    width: ["hide", "linear"],
    height: ["hide", "linear"],
    opacity:"hide"
});

jQuery Selector Filters & Their Meanings

Here are some example selector combinations:

"blockquote i" // Matches within a

"ol > li" //li as a direct child of ol

"#output + *" // The sibling after the #output

"div.note > h1 + p" //

after

inside a div.note

Note that selector combinations are not limited to combinations of two selectors: three or more selectors are allowed, too.

Selector Grammar

The jQuery selector grammar is very similar to that of CSS3, and it is explained in detail in “jQuery Selectors” on page 89.
The following is a summary: 

Simple tag, class, and id selectors
* tagname .classname #id
Selector combinations
A B B as a descendant of A
A > B B as a child of A
A + B B as a sibling following A
A ~ B B as a sibling of A