function changeQuantities( material_id , sheet_qty , sheet_size_id )
{
    $('sheet_qty').disabled = true;
    url =  'ajax.php?mode=get_quantities&material_id=' + material_id + '&sheet_qty=' + sheet_qty; //prompt( "" , url );
    loadXMLDoc( url );
}

function checkQuantityResponse( empty , responce )
{
    var aData = eval('(' + responce + ')');
    var select = document.getElementById("sheet_qty");
    
    if ( select.hasChildNodes() )
        while ( select.childNodes.length >= 1)
            select.removeChild( select.firstChild );
            
    var tmpElement = document.createElement('option');
        tmpElement.value = "";
        tmpElement.text  = " -- Choose Quantiy -- "; 
            
    select.options.add( tmpElement );          
            
    for( elem in aData['quantities'] )
    {
        tmpElement = document.createElement('option');
        tmpElement.value = aData['quantities'][elem]['sheet_qty'];
        //tmpElement.text  = aData['quantities'][elem]['sheet_qty'] + " Sheets - $" + formatPrice( aData['quantities'][elem]['cost'] );
        tmpElement.text  = aData['quantities'][elem]['sheet_qty'] + " Sheets";
            
        if( aData['quantities'][elem]['sheet_qty'] == aData['selected'] )
            tmpElement.selected = "selected";

        select.options.add( tmpElement );
    } 

    document.getElementById('sheet_qty').disabled = false;
}

function getQuotes()
{
    if( hasEmptyFields( 's_zip material_id sheet_qty sheet_size_id addr_type' , 'Please complete the form.' ) )
        return false;
        
    var url = "ajax.php?mode=get_shipping&zip=" + $('s_zip').value + "&sheet_qty="+$('sheet_qty').value + "&sheet_size_id=" + $('sheet_size_id').value +
                                  "&addr_type=" + $('addr_type').value + "&material_id=" + $('material_id').value;
                                  
    $('shipping_quotes').innerHTML = '<br /><div align="center"><img src="/resources/images/loader.gif" alt="LOADING..." /></div><br />';                                  
                                  
    loadXMLDoc( url );
}

function getQuotesResponse( empty , response )
{
    $('shipping_quotes').innerHTML = response;
}