<div id="product-zoom-gallery" class="product-image-gallery">
                                            @foreach (var item in Model.Images)
                                            {
                                                <a onclick="myFunction('@item')" class="product-gallery-item active" href="#" @*onclick="changeImg('/@item');"*@
                                               data-image="/@item"
                                               data-zoom-image="/@item">
                                                    <img id="myImg @item"  src="/@item"
                                                     >
                                                </a>
                                            }

                                        </div>

我想发送一个动态ID到myFunction(item)，其中“item”是我的动态ID，我想像这样发送到getElementById方法：

function myFunction(item){
            var string = `"myImg ${item}"`
            alert(string);
            var modal = document.getElementById("myModal");

            var img = document.getElementById(`"${string}"`);
            var modalImg = document.getElementById("img01");
            var captionText = document.getElementById("caption");
            img.onclick = function () {
                modal.style.display = "block";
                modalImg.src = this.src;
                captionText.innerHTML = this.alt;
            }

            // Get the <span> element that closes the modal
            var span = document.getElementsByClassName("close")[0];

            // When the user clicks on <span> (x), close the modal
            span.onclick = function () {
                modal.style.display = "none";
            }
        }

但是var img对我不起作用。我希望从var img = document.getElementById(“${string}”);中找到我的img标记。