Adjusting the opacity of the background image in the section - focus solely on the background

This section is what I'm working on.

    <section ID="Cover">
        <div id="searchEngine">hello</div>
    </section>

I am trying to achieve a fade in/out effect specifically for the background image of the Cover section. The current function I am using fades the entire section, but I want to target only the background image. Is there a way to do something like this?

$("#Cover").css("background-image").fadeOut();
??

(I am also defining the initial background image within the following function)

    var imageID=0;
var time=0;
function changeimage(every_seconds)
{
    //change the image
    if(imageID==0)
    {
        $("#Cover").fadeOut(time, function () {
        $("#Cover").css("background-image", "url(images/cover1.jpg)");
        $("#Cover").fadeIn(time);});
        imageID++;
        time=1000;
    }
    else 
    {
        if(imageID==1)
        {
            $("#Cover").fadeOut(time, function () {
            $("#Cover").css("background-image", "url(images/cover2.jpg)");
            $("#Cover").fadeIn(time);});
            imageID++;
        }
        else
        {
            if(imageID==2)
            {
                $("#Cover").fadeOut(time, function () {
                $("#Cover").css("background-image", "url(images/cover3.jpg)");
                $("#Cover").fadeIn(time);});
                imageID++;
            }
            else
            {
                if(imageID==3)
                {
                    $("#Cover").fadeOut(time, function () {
                    $("#Cover").css("background-image", "url(images/cover4.jpg)");
                    $("#Cover").fadeIn(time);});
                    imageID++;
                }
                else
                {
                    if(imageID==4)
                    {
                        $("#Cover").fadeOut(time, function () {
                        $("#Cover").css("background-image", "url(images/cover5.jpg)");
                        $("#Cover").fadeIn(time);});
                        imageID=0;
                    }
                }
            }
        }
    }
    //call same function again for x of seconds
    setTimeout("changeimage("+every_seconds+")",((every_seconds)*1000));
}
javascriptjqueryhtmlcss

Answer №1

I completely agree with TrueBlueAussie's suggestion to use HTML instead of CSS background images for simplification. Here is a live example:

<html>
    <head>
        <style type="text/css">
            #bgImg { 
                position: fixed; 
                width: 100%; 
                height: 100%; 
                top:0; 
                left: 0; 
                z-index: -1;
            }
            #mainContent {
                width: 960px; 
                margin: 20px auto; 
                padding: 15px; 
                background: #f2f2f2; 
                text-align: center;
            }
        </style>
    </head>
    <body>
        <img src="yourImg.jpg" id="bgImg">
        <section id="mainContent">
            <h2>Your Heading</h2>
            <p>Your content....</p>
            <button id="inBtn">Background Image fade in</button>
            <button id="outBtn">Background Image fade out</button>
        </section>
    </body>
    <script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
    <script>

        function resize(){
            $("#bgImg") 
            .width($(window).width()) 
            .height($(window).width() * .67); 

            if($("#bgImg").height() <= $(window).height()){ 
                $("#bgImg")
                .height($(window).height())
                .width($(window).height() * 1.5);
            }

        }

        $(document).ready(function(){    

            resize(); 


            $("#inBtn").on("click",function(){
                $("#bgImg").fadeIn();

            }); 

            $("#outBtn").on("click",function(){
                $("#bgImg").fadeOut();

            }); 

        });

        $(window).resize(function(){ resize(); });

    </script>
</html>

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