Артист,
<html>
<head>
<meta charset="utf-8">
<script>
document.addEventListener
(
"DOMContentLoaded",
function()
{
document.querySelector('select').addEventListener
(
'change',
function()
{
alert(this.options[this.selectedIndex].text)
}
)
}
)
</script>
</head>
<body>
<select name=item>
<option value='1'> Один</option>
<option value='2'> Два</option>
<option value='3'> Три</option>
</select>
</body>
</html>