How to post an array in xslt to a form which can be accesssed by javascript function for validation?

My xsl snippet looks  like this:
<root>
<years>
    <yearl>
        <year>2004</year>
        <period>prior</period>
    </yearl>
    <yearl>
        <year>2005</year>
        <period>prior</period>
    </yearl>
</years>
</root>

I am taking this as input and using xslt to render my page. I want to send all the years to my form.The code looks like:

<form method="POST" action="test.jsp" id="tes">
----
--
 <xsl:for-each select="/ROOT/years/yearl">
     <input type="hidden" name="years[]" id="years[]" value="{/ROOT/years/yearl/@year}" />
--
--
</xsl:for-each>
--
</form>

This is my javascript function which is being called on hitting save button

function alert{

              var year = [document.getElementById('years')];
             var y = year.length  ;                        
                           
                            if (confirm("The year is  " + year[1].value+ " you still want to save?")) {
                                    document.getElementById(test').submit();
                                }

}

In this function I want to get the list of all the years and do some validation based upon that. But this does not seem to work. PLease help!