Javascript + printing values from select box

I have a select box call 'ToLB' which takes in value items from another select box. I need to extract those selected values from 'ToLB' and print it on a label, this is how I do it but apparently it's not working as in no error message but nothing was printed to the label, please kindly advice, thanks! :

The Select box:

<select multiple size="8" name="ToLB" style="width: 135px" onblur="javascript:dropValue6(this)">
</select>

The label:

QMType: <asp:Label ID="destinationQualMemType" runat="server" ></asp:Label >  

Javascript function:

function dropValue6(source) {
    while (source.selectedIndex != -1)
    {
        if (source.selectedIndex != 0) arSelected.push(source.options[source.selectedIndex].value);
        source.options[source.selectedIndex].selected = false;

        var i;
        for (i = 0; i < arSelected; i++) {

            document.getElementById('<%= destinationSpendingType.ClientID %&g开发者_开发知识库t;').innerHTML =
+ "\n" + document.getElementById('<%= destinationSpendingType.ClientID %>').innerHTML = arSelected[i].value;
        }
    }

         } 

---

You might look at the lines marked //***

function dropValue6(source) {
    var arSelected = [];   // ***
    while (source.selectedIndex != -1)
    {
        if (source.selectedIndex != 0) arSelected.push(source.options[source.selectedIndex].value);
        source.options[source.selectedIndex].selected = false;

        var i;
        for (i = 0; i < arSelected.length; i++) {  // ***                
            document.getElementById('<%= destinationSpendingType.ClientID %>').innerHTML = arSelected[i];  // ***
        }
    }    
}