- <script type="text/javascript">
- n=0;
- function key(){
- n++;
- if (n==3){
- str=document.getElementById('txt').value;
- document.getElementById('txt').value=str+'-';
- }
- if (n==5){
- str=document.getElementById('txt').value;
- document.getElementById('txt').value=str+'-';
- }
- document.getElementById('num').value=n;
- }
- </script>