I'm trying to make a webpage where the user inputs a nine digit number and the output has the letters ABC added to the beginning. Eg. input:'123456789' output:ABC123456789

Here is my code (pieced together from samples on the web) but there is no output:

```
<HTML>

<HEAD>

<TITLE>Add ABC</TITLE>

<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">

<SCRIPT TYPE="TEXT/JAVASCRIPT">

function convert() {

    var inp = document.conv.inpt.value 
    outp = "ABC" + inp
    document.conv.newname.value = outp
  }
}
</SCRIPT>

</HEAD>

<BODY>

<FORM ACTION="#" NAME="conv">
Input:<INPUT TYPE=TEXT NAME="inpt" SIZE=40>
<BR><BR>
<INPUT TYPE=BUTTON VALUE="Enter Name" ONCLICK="convert()">
<BR><BR>
Output:<INPUT TYPE=TEXT NAME="newname" SIZE=40 DISABLED>
</FORM>

</BODY>

</HTML>

```