I have a drop down, where when a user picks a choice, it should fire an alert. Here is how I've written it:

```
    function changeddl($this) {
    if ($this.value == "New Posting") {
        alert("Please attach supporting document(s) below.");
    }
}

function changedd2($this) {
    if ($this.value == "SpecialPay") {
        alert("Please attach supporting document(s) below.");
    }
}

function changedd3($this) {
    if ($this.value == "DataEntry") {
        alert("Please attach supporting document(s) below.");
    }
}

function changedd4($this) {
    if ($this.value == "CreditCardACHPosting") {
        alert("Verify CCD or Banking Information has been added.");
    }
}

```

Is there a way to combine all?

Thank you.