function LundCompare( submit_link )
{
    if( document.forms['ModelsList']['compare'].length )
    {
        var index;
        var selected_items = new Array();

        for( index=0; index<document.forms['ModelsList']['compare'].length; index++ )
        {
            if( document.forms['ModelsList']['compare'][ index ].checked == true )
            {
                selected_items[ selected_items.length ] = document.forms['ModelsList']['compare'][ index ].value;
            }
        }
        
        if( selected_items.length != 2 )
        {
            alert( 'Необходимо выбрать любые 2 модели лодок и нажать "сравнить".' );
            return false;
        }
        
        location.href = submit_link
                      + '?model1=' + selected_items[0]
                      + '&model2=' + selected_items[1]
                      ;
    }
    
    return true;
}