Someone

<script type="text/javascript"> 

        jQuery(document).ready( function(){       
//		$myID = 'diving';
		var $dialog = $('<div id="diving"></div>')
//		var $dialog = $('<div id="diving"></div>')
                .dialog({ 
				
						height: 350,
                        modal: true,
                        position: 'center',
                        autoOpen:false,
                        overlay: { opacity: 0.5, background: 'black'}
                        });
                }
        );
</script>


<button id="opener" onClick="$('#diving').attr('id', 'testing' ); $('#testing').dialog('option', 'title', 'Dialog Title' ); $('#testing').html('ok').dialog('open');">Open the dialog</button>