Javascript 根据多个选择列表显示特定图片

现在我正在做一些工作，我不是一个真正的程序员，所以我在这方面有点困难。基本上，我有4个选择列表，如下所示：

<img class="stylephoto" id="image" src="Null_Image.png" />
<table class="styletable">

  <select class="styleclass" id="fencelist">
    <option selected disabled hidden>Choose here</option>
    <option value="Arrow">Arrow</option>
  </select>

  <select class="styleclass" id="stylelist">
    <option selected disabled hidden>Choose here</option>
    <option value="Fence">Fence</option>
    <option value="1 Door Gate">1 Door Gate</option>
    <option value="2 Door Gate">2 Door Gate</option>
  </select>`

  <select class="styleclass" id="panellist">
    <option selected disabled hidden>Choose here</option>
    <option value="Spear">Spear</option>
    <option value="Triad">Triad</option>
  </select>

  <select class="styleclass" id="raillist">
    <option selected disabled hidden>Choose here</option>
    <option value="Scroll">Scroll</option>
    <option value="Circle">Circle</option>
    <option value="X">X</option>
  </select>

  <select class="styleclass" id="fencelist">
    <option selected disabled hidden>Choose here</option>
    <option value="Arrow">Arrow</option>
  </select>

  <select class="styleclass" id="stylelist">
    <option selected disabled hidden>Choose here</option>
    <option value="Fence">Fence</option>
    <option value="1 Door Gate">1 Door Gate</option>
    <option value="2 Door Gate">2 Door Gate</option>
  </select>`

  <select class="styleclass" id="panellist">
    <option selected disabled hidden>Choose here</option>
    <option value="Spear">Spear</option>
    <option value="Triad">Triad</option>
  </select>

  <select class="styleclass" id="raillist">
    <option selected disabled hidden>Choose here</option>
    <option value="Scroll">Scroll</option>
    <option value="Circle">Circle</option>
    <option value="X">X</option>
  </select>

基本上，我希望所有的选择都能改变图片的显示，因此，我希望它是

Arrow\u Image.png

，而不是

Arrow\u Image.png

  <select class="styleclass" id="fencelist">
    <option selected disabled hidden>Choose here</option>
    <option value="Arrow">Arrow</option>
  </select>

  <select class="styleclass" id="stylelist">
    <option selected disabled hidden>Choose here</option>
    <option value="Fence">Fence</option>
    <option value="1 Door Gate">1 Door Gate</option>
    <option value="2 Door Gate">2 Door Gate</option>
  </select>`

  <select class="styleclass" id="panellist">
    <option selected disabled hidden>Choose here</option>
    <option value="Spear">Spear</option>
    <option value="Triad">Triad</option>
  </select>

  <select class="styleclass" id="raillist">
    <option selected disabled hidden>Choose here</option>
    <option value="Scroll">Scroll</option>
    <option value="Circle">Circle</option>
    <option value="X">X</option>
  </select>

---

我希望这个解释足够了，我感谢你的帮助。

JS中的这个关键字用于指向对象环境/函数环境，所以这里只指向select having id=“fencelist”

  <select class="styleclass" id="fencelist">
    <option selected disabled hidden>Choose here</option>
    <option value="Arrow">Arrow</option>
  </select>

  <select class="styleclass" id="stylelist">
    <option selected disabled hidden>Choose here</option>
    <option value="Fence">Fence</option>
    <option value="1 Door Gate">1 Door Gate</option>
    <option value="2 Door Gate">2 Door Gate</option>
  </select>`

  <select class="styleclass" id="panellist">
    <option selected disabled hidden>Choose here</option>
    <option value="Spear">Spear</option>
    <option value="Triad">Triad</option>
  </select>

  <select class="styleclass" id="raillist">
    <option selected disabled hidden>Choose here</option>
    <option value="Scroll">Scroll</option>
    <option value="Circle">Circle</option>
    <option value="X">X</option>
  </select>

---

希望这对您有用…

使用类而不是事件侦听器的ID。您不能从ID调用多个元素。
请检查下面的代码

  <select class="styleclass" id="fencelist">
    <option selected disabled hidden>Choose here</option>
    <option value="Arrow">Arrow</option>
  </select>

  <select class="styleclass" id="stylelist">
    <option selected disabled hidden>Choose here</option>
    <option value="Fence">Fence</option>
    <option value="1 Door Gate">1 Door Gate</option>
    <option value="2 Door Gate">2 Door Gate</option>
  </select>`

  <select class="styleclass" id="panellist">
    <option selected disabled hidden>Choose here</option>
    <option value="Spear">Spear</option>
    <option value="Triad">Triad</option>
  </select>

  <select class="styleclass" id="raillist">
    <option selected disabled hidden>Choose here</option>
    <option value="Scroll">Scroll</option>
    <option value="Circle">Circle</option>
    <option value="X">X</option>
  </select>

HTML

  <select class="styleclass" id="fencelist">
    <option selected disabled hidden>Choose here</option>
    <option value="Arrow">Arrow</option>
  </select>

  <select class="styleclass" id="stylelist">
    <option selected disabled hidden>Choose here</option>
    <option value="Fence">Fence</option>
    <option value="1 Door Gate">1 Door Gate</option>
    <option value="2 Door Gate">2 Door Gate</option>
  </select>`

  <select class="styleclass" id="panellist">
    <option selected disabled hidden>Choose here</option>
    <option value="Spear">Spear</option>
    <option value="Triad">Triad</option>
  </select>

  <select class="styleclass" id="raillist">
    <option selected disabled hidden>Choose here</option>
    <option value="Scroll">Scroll</option>
    <option value="Circle">Circle</option>
    <option value="X">X</option>
  </select>

---

您需要查看

onchange（）

listener的可能重复项