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/*
 * Usage: $('#image').prop('src', url2uri('/200.gif') );
 */

function url2uri(src, width, height) {
    var img = new Image();
    
    img.src = src;
    
    width = width || 300;
    height = height || 300;
    
    // Create an empty canvas element
    var canvas = document.createElement("canvas");
    canvas.width = width;
    canvas.height = height;

    // Copy the image contents to the canvas
    var ctx = canvas.getContext("2d");
    ctx.drawImage(img, 0, 0);

    // Get the data-URL formatted image
    // Firefox supports PNG and JPEG. You could check img.src to
    // guess the original format, but be aware the using "image/jpg"
    // will re-encode the image.
    var dataURL = canvas.toDataURL("image/png");

    return dataURL;
   // return dataURL.replace(/^data:image\/(png|jpg);base64,/, "");
}