script not working on document.ready in Safari & Chrome (FF okay), but works on document.resize

Question

I have the following jquery script to resize an image and give it a left margin to horizontally center it. The script works perfectly in FF, but in Safari and Chrome I have problems.

Safari & Chrome prob: the image resizes okay, but the leftMargin appears to be set before the image is resized resulting in an image that is pushed much too far left. This problem occurs only on document.ready. When resizing the browser, the script works fine.

function imageresize() {
    var h = $(window).height(),
        w = $(window).width(),
        newHeight = h * 0.5,
        newTopMargin = newHeight * 0.12;

        $('img.resize').css({'height' : newHeight + 'px', 'margin-top' : '-' + newTopMargin + 'px'});
    var leftMargin = (w - ($('img.resize').width()))/2;
        $('img.resize').css('margin-left', leftMargin + 'px');

}
$(document).ready(function() {
  imageresize();
});

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

The script is placed before </body>.

Any assistance would be much appreciated!

Answer 1

The document ready event can fire before images have finished loading. Try binding to window, or images' load event instead.

$(window).load(function() {
  imageresize();
});

// or

$('img').load(function() {
  imageresize();
});

Answer 2

If its just one image, you could also bind to the image load event.

$(img).load(function() {
  imageresize();
});