never fear HTML man is here! LOL

use this

Code:
<html>

<head></head>


<script language="vbscript">
Sub Button1_OnClick
	MsgBox "The Value selected from the combobox is " & document.Form1.IDCar(document.Form1.IDCar.selectedIndex).value
End Sub
</script>

<body>
<input type="button" value="click me" name="button1">

<br><br>
<form Name="Form1">
	<select Name="SelCar" ID="IDCar">
	<option value="Mini">Mini</option>
	<option value="Mini Metro">Mini Metro</option>
	<option value="Metro">Metro</option>
	</select>
</form>
</body>

</html>