Superimpose a banner div over another div, with jQuery if possible

I have a "news" div and a "banner" div.

I want user to see the "banner" div when page loads. This "banner"开发者_C百科 div should show over the "news" div, exactly over the position, covering the "news" div. So:

• How should I do to detect position of "news" div and show the "banner" div over, floating, without affecting the grid structure?

• Any jQuery plugin that allows user to hide that div and never show again? w/ cookie?

Hope you've understood my idea. I leave an image:

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use the jquery's offset http://api.jquery.com/offset/

and the jquery's show and hide http://api.jquery.com/show/

you can use hte negative margin for the banner to come over to the news...div.

Let me know if you need anything...

use absolute postioning for news banner.

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I've written a script for you which should help.

It uses the Cookie plugin for jQuery.

I've put some comments in the code so hopefully it should be pretty self-explanatory.

Feel free to come back with other questions you may have.

Usage
You should see a banner on first load, then click run again and it should dissapear.
The banner will be positioned exactly above the news-list using absolute positioning, the width/height and the top/left offset of the newslist.

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I realise this question has already been answered, but I thought I'd offer a slight alternative, using CSS, jQuery and the jQuery cookie plugin:

html:

<div class="container">
    <div class="news">
        <p>Lorem ipsum dolor sit amet...</p>
    </div>
    <div class="banner">
        <p>Yet more text, this time it's the banner.</p>
        <span class="close">X</span>
    </div>
</div>
<div id="clear">Remove the cookie</div>

css:

.container {
    width: 80%;
    min-height: 400px;
    position: relative;
    border: 4px solid #000;
}
.news {
    width: 100%;
    height: 100%;
}

.banner {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #f00;
}
.close {
    position: absolute;
    top: 0;
    right: 0;
    border-left: 2px solid #fff;
    border-bottom: 2px solid #fff;
    width: 2em;
    line-height: 2em;
    text-align: center;
    display: block;
    cursor: pointer;
}
#clear {
    width: 80%;
    text-align: right;
    color: #fff;
    background-color: #999;
    border: 4px solid #000;
    border-top-width: 0;
    font-family: arial, sans-serif;
    cursor: pointer;
}

jQuery:

$(document).ready(

function(){
    if ($.cookie('closed')){
        $('.banner').remove();
    }
    $('.close').click(
        function(){
            $(this).closest('.banner').remove();
            $.cookie('closed',true, {expires: 30});
        });
    $('#clear').click(
        function(){
            $.cookie('closed',false, {expires: -200});
        });
});

JS Fiddle demo.

A slightly more pleasing demo, with animate():

$(document).ready(
    function(){
        if ($.cookie('closed')){
            $('.banner').remove();
        }
        $('.close').click(
            function(){
                $(this)
                    .closest('.banner')
                    .animate(
                        {
                            'top':'120%'
                        }, 1500,
                        function(){
                            $(this).remove();
                        }
                    );
                $.cookie('closed',true, {expires: 30});
            });
        $('#clear').click(
            function(){
                $.cookie('closed',false, {expires: -200});
            });
    });

Demo at JS Fiddle

---

Edited with an afterthought, assuming that you get repeat visitors, it might be worth re-setting the cookie in the initial if check, to ensure that they don't see the banner ever again (unless they leave more than 30 days between visits), changing it to:

if ($.cookie('closed')){
    $('.banner').remove();
    $.cookie('closed',true,{expires: 30});
}