Yahoo! UI Library

var YLang = Y.Lang,
    YisValue = YLang.isValue,
    Ysubstitute = Y.Lang.substitute,
    YNode = Y.Node,
    Ycreate = YNode.create,
    YgetClassName = Y.ClassNameManager.getClassName,

    DATATABLE = "datatable",
    COLUMN = "column",
    
    FOCUS = "focus",
    KEYDOWN = "keydown",
    MOUSEENTER = "mouseenter",
    MOUSELEAVE = "mouseleave",
    MOUSEUP = "mouseup",
    MOUSEDOWN = "mousedown",
    CLICK = "click",
    DBLCLICK = "dblclick",

    CLASS_COLUMNS = YgetClassName(DATATABLE, "columns"),
    CLASS_DATA = YgetClassName(DATATABLE, "data"),
    CLASS_MSG = YgetClassName(DATATABLE, "msg"),
    CLASS_LINER = YgetClassName(DATATABLE, "liner"),
    CLASS_FIRST = YgetClassName(DATATABLE, "first"),
    CLASS_LAST = YgetClassName(DATATABLE, "last"),
    CLASS_EVEN = YgetClassName(DATATABLE, "even"),
    CLASS_ODD = YgetClassName(DATATABLE, "odd"),

    TEMPLATE_TABLE = '<table></table>',
    TEMPLATE_COL = '<col></col>',
    TEMPLATE_THEAD = '<thead class="'+CLASS_COLUMNS+'"></thead>',
    TEMPLATE_TBODY = '<tbody class="'+CLASS_DATA+'"></tbody>',
    TEMPLATE_TH = '<th id="{id}" rowspan="{rowspan}" colspan="{colspan}" class="{classnames}" abbr="{abbr}"><div class="'+CLASS_LINER+'">{value}</div></th>',
    TEMPLATE_TR = '<tr id="{id}"></tr>',
    TEMPLATE_TD = '<td headers="{headers}" class="{classnames}"><div class="'+CLASS_LINER+'">{value}</div></td>',
    TEMPLATE_VALUE = '{value}',
    TEMPLATE_MSG = '<tbody class="'+CLASS_MSG+'"></tbody>';