Question

I am a bit stuck. I am creating a rotating background image with jquery and css. I resize the image width according to the browser size, but I do not want to change the height because it distorts the picture. So I want to do a simple math equation to make the image vertically centered on the screen. For example: The image has an original size of 1600px and it resizes to 1200px, I need to get the height of the resized image. I have tried this with jquery simple: $(“#img1”).height(); but it returns the value 0. Here is my jquery, html and css:

HTML

<div id="div2"><img src="images/1.jpg" class="bg" id="img1" /></div>
<div id="div3"><img src="images/1-blur.jpg" class="bg"/></div>
<div id="content">Body Content goes here!!</div>

<script>
var iheight = $("#img1").height();
$("#content").append(iheight);
</script>

CSS
body{
padding: 0;
margin: 0;
position: relative;
overflow: hidden;
}
.bg {
width: 100%;
position: absolute;
top: 0;
left: 0;
z-index: 1;
}
#content{
position: relative;
z-index: 999;
}

And Jquery to rotate images:

$(window).load(function(){
function startfade(){

$("#div3").fadeIn(3000, function(){
    $(this).delay(2000).fadeOut(2000);
    $("#div2").fadeIn(3000, function(){
        $(this).delay(2000).fadeOut(2000);
});
});

}
setInterval(function() {
      startfade();
}, 6000);


startfade();


});

Any help on how to get the actual height of the image would be awesome! Thank you so much!

Answer 1

Try to call height when image is loaded (and you should always enclose your code in $(function() {}); so your code is invoked when DOM is ready)

$(function() {
   $('#img1').load(function() {
       $("#content").append($(this).height());
   });
});