store only selected multi options

Using following code to view two column chooser. Issue is loop below , I get all from the list ( selected, unselected )

How is it possible to get only the selected.

[CODE] <div class=”selectTask”>
<form name=”TaskList” method=”post” action=”TaskList.asp”>
<select name=”searchable[]” id=’searchable’ multiple=’multiple’>
<?php foreach( $output as $each ): ?>
<?php $var++?>
<option value=”$var”><?=$each?></option>
<?php endforeach; ?>
</select>
</form>
</div>
<div class=”clickButtons”>
<input type = “button”
value = “clear selection” />

<input type = “button”
onClick=”send_message()”
value = “remove top task and send message to next” />
</div>

[/CODE][CODE]

function send_message(){
var selectedArray = new Array();
var selObj = document.getElementById(‘searchable’);
var i;
var count = 0;
for (i=0;i<selObj.options.length;i++)
{
if (selObj.options[i].selected)
{
selectedArray[count] = selObj.options[i].text;
count++;
}
}
alert(selectedArray);
}
</script>[/CODE]

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