Display Selection In a Textbox

I am trying to display the selection made in a selectbox in a textbox.  The textbox is named what.

<script type="text/javascript">
			$(document).ready(function () {
				$('#Place').iPhonePicker({ width: '280px', imgRoot: 'Images/Misc' });
				$('#Place option:selected').text();
				//$('#Place').show(); // made invisible by iPhonePicker command
			});
		</script>	
	
    
    <input name="What" type="text" />

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