How Get Value Of A Drop Down In Internet Explorer?

How does one find the value of a drop down in Internet Explorer?

The form below works in Firefox and Safari. But not in Internet
Explorer. Can someone tell me how to code this so IE understands it?

<script language="javascript">
function copyDescription() {

document.myForm.Description.value=document.myForm. MakeDescription.value
}
</script>

<form name="myForm" id="myForm">
<SELECT name="MakeDescription" onChange="copyDescription();">
<OPTION selected value="">Choose</OPTION>
<OPTION>A</OPTION>
<OPTION>B</OPTION>
<OPTION>C</OPTION>
</SELECT>
<br /><br />
<input name="Description" id="Description" type="text" />
</form>