jQuery Multiselect

I have a few multiselects that I'm trying to manipulate through jQuery and having some trouble.

3 multiselects are for individual items.
1 multiselect for global items.
all multiselects have the exact same options within.

If a user changes the selected items in the global multi, I need to loop through the 3 multi's and clear and then select the same options.

I am able to get the values into an array of the items that are selected in the global correctly, but when I go to try and set the same options in the single multi's, nothing is happening and I am not getting any JS error messages.        

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.15/jquery-ui.min.js"></script>

<p>multi 1<br>
<select name="mvv1" id="mvv1">
<option value="temp1">temp1</option>
<option value="temp2">temp2</option>
<option value="temp3">temp3</option>
</select></p>

<p>multi 2<br>
<select name="mvv2" id="mvv2">
<option value="temp1">temp1</option>
<option value="temp2">temp2</option>
<option value="temp3">temp3</option>
</select></p>

<p>multi 3<br>
<select name="mvv3" id="mvv3">
<option value="temp1">temp1</option>
<option value="temp2">temp2</option>
<option value="temp3">temp3</option>
</select></p>

<p>global multi<br>
<select name="global_mvv" id="global_mvv" onChange="javascript:updateSelects();">
<option value="temp1">temp1</option>
<option value="temp2">temp2</option>
<option value="temp3">temp3</option>
</select></p>

<script type="text/javascript">
function updateSelects(){

var numItems = 3;  
var selectedElements = []; 

$('#global_mvv :selected').each(function(i, selected){
	selectedElements[i] = [];
	selectedElements[i][1] = $(selected).index(); 
});

// loop through items and set to global items selected								
$(numItems).each(function(j){

$(selectedElements).each(function(i){
$('#mvv'+j+' option').eq(selectedElements[i][1]);
});

});

};
</script>

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