Add image preview without upload an image

preview

function readURL(input, i) {
    if (input.files && input.files[0]) {
        var reader = new FileReader();

        reader.onload = function(e){
           var image_tag = document.createElement('img');

           $(image_tag)
               .attr('src', e.target.result)
               .width(100)
               .height(100);

           document.getElementById("images").appendChild(image_tag)
        };

        reader.readAsDataURL(input.files[i]);
    }
}

function setImages(input){
    var len = input.files.length;

    for(i = 0; i < len; i++){
         readURL(input, i);
    }
}