I have 2 buttons on a page that I can't change code:

```
<button type="submit" name="next" class="button">Next</button>
<button type="submit" name="back" class="button">Previous</button>

```

On the back button I want to use javascript to reset the values of fields on that page by using:

```
document.getElementById(setV).value = "0"

```

I need to know how to do this on the name of a button.

I can't use getElementById or class as the name is the only thing to distinguish them. I have tried the follwing to take action but no joy:

```
$('[name="next"]').onclick();

```