<html>
<head>
<title>Untitled</title><script>
function drop1()
{
document.frmtest.test2.selectedIndex = 0;
document.frmtest.test3.selectedIndex = 0;
}
function drop2()
{
document.frmtest.test1.selectedIndex = 0;
document.frmtest.test3.selectedIndex = 0;
}
function drop3()
{
document.frmtest.test2.selectedIndex = 0;
document.frmtest.test1.selectedIndex = 0;
}
</script>
</head>
<body>
<form name="frmtest">
<select name="test1" onchange="drop1()">
<option>1
<option>2
<option>3
</select>
<select name="test2" onchange="drop2()">
<option>1
<option>2
<option>3
</select>
<select name="test3" onchange="drop3()">
<option>1
<option>2
<option>3
</select>
</form>
</body>
</html>
