Untitled

Image width traces zero with onload when cached
var oImage = new Image();

oImage.src = 'http://mydomain.com/image.png';

container.html(oImage);

oImage.onload = function(){

    alert(this.width);
}

container.waitForImages(function() {

    var cWidth = $(this).width();

    alert("width: "+cWidth); // returns 0 - works first time but not cached

});

// Adding the image to the container for preload

container.html('<img src="mygraphic.png" />');

var image = $('<img/>', {
    src : 'http://mydomain.com/image.png'
}).load(function () {
    alert(this.width);
})
// maybe clear container before if you want
.appendTo(container);

var image = $('<img/>')
    .load(function () {
        alert(this.width);
    })
    .attr('src','http://mydomain.com/image.png')
    .appendTo(container)
    ;