Question: I am working with C# and i am loading a jquery file 1.8.1 in the layout, but there is a module pulling through which is adding another jquery file 1.6.1 is there any way for me to remove it without physically going in and remove it so i need to remove it dynamically. 

Thanks.

Answer: 
You are changing the `src` attribute of the `<div class="image_cell" id="1">`, which is non-existent. What you want to do is to access its child node (the `<img>`) instead:

```
document.getElementById("1").querySelector("img").src = "StarOn.gif";

```
I noticed that `correct_answer` is a Number so I converted it to a String (using `toString`) so it can be used to match the `.image_cell` `id`. I added an `input` to demonstrate it actually functions.

See Snippet 

```js
var correct_answer = 0;

function starOn(correct_answer) {
  var x = correct_answer.toString();
  var iCell = document.getElementById(x);
  var iStar = iCell.querySelector('img');
  iStar.src = "http://findicons.com/files/icons/249/xmas_pack/48/star.png";
}
```

```css
.image_cell {
  display: inline-block;
}
input {
  width: 48px;
  text-align: center;
}
```

```html
<div class="image_line">
  <div class="image_cell" id="1">
    <img src="https://cdn0.iconfinder.com/data/icons/super-mono-basic/yellow/star_basic_yellow.png" />
  </div>
  <div class="image_cell" id="2">
    <img src="https://cdn0.iconfinder.com/data/icons/super-mono-basic/yellow/star_basic_yellow.png" />
  </div>
  <div class="image_cell" id="3">
    <img src="https://cdn0.iconfinder.com/data/icons/super-mono-basic/yellow/star_basic_yellow.png" />
  </div>
  <div class="image_cell" id="4">
    <img src="https://cdn0.iconfinder.com/data/icons/super-mono-basic/yellow/star_basic_yellow.png" />
  </div>
  <div class="image_cell" id="5">
    <img src="https://cdn0.iconfinder.com/data/icons/super-mono-basic/yellow/star_basic_yellow.png" />
  </div>

</div>
<br/>
<label>Type in a number 1 to 5</label>
<input oninput="starOn(this.value);">
```