<form name=form1>
<table name=t1>
<select name=s1 onchange="form1.s2.value=this.value">
<option value=1>1</option>
<option value=2>2</option>
<option value=3>3</option>
</select>
<br>
<input type=text name=s2 value="">
</table>
</form>
<table name=t1>
<select name=s1 onchange="form1.s2.value=this.value">
<option value=1>1</option>
<option value=2>2</option>
<option value=3>3</option>
</select>
<br>
<input type=text name=s2 value="">
</table>
</form>
function sel()
{
if (document.form1.s1.value=="1") document.form1.s2.value="A";
if (document.form1.s1.value=="2") document.form1.s2.value="B";
if (document.form1.s1.value=="3") document.form1.s2.value="C";
}
</script>
<table name=t1>
<select name=s1 onchange="aa()">
<option value=1>1</option>
<option value=2>2</option>
<option value=3>3</option>
</select>
<br>
<input type=text name=s2 value="">
</table><script LANGUAGE="javascript">
<!--
function aa() {
if(document.forms[0].s1.value=="1"){ document.forms[0].s2.value="A";}
}
//-->
</script>