Load Image to Canvas

function setBackground() {
blackberry.invoke.card.invokeFilePicker({
	mode: blackberry.invoke.card.FILEPICKER_MODE_PICKER,
	viewMode: blackberry.invoke.card.FILEPICKER_VIEWER_MODE_GRID,
	sortBy: blackberry.invoke.card.FILEPICKER_SORT_BY_NAME,
	sortOrder: blackberry.invoke.card.FILEPICKER_SORT_ORDER_ASCENDING}, function (path) {
		var canvas = document.getElementById("canvas");
		var ctx = canvas.getContext("2d");
		loadImage('file://'+path, function() {
			ctx.drawImage(background, 0, 0, 768, 1280)
		});
		function loadImage(src, onload) {
			var img = new Image();
			img.onload = onload;
			img.src = src;
			return img;
		}
	})
}