public/javascripts/yui/datatable/datatable.js
function() {
    var elThead = this._elThead;
    if(elThead) {
        var elTable = elThead.parentNode;
        Ev.purgeElement(elThead, true);
        this._destroyColumnHelpers();
        elTable.removeChild(elThead);
        this._elThead = null;
    }
}
function() {
    var elThead = this._elThead;
    if(elThead) {
        var elTable = elThead.parentNode;
        Ev.purgeElement(elThead, true);
        this._destroyColumnHelpers();
        elTable.removeChild(elThead);
        this._elThead = null;
    }
}
function ( ) { var elThead = this . _elThead ; if ( elThead ) { var elTable = elThead . parentNode ; Ev . purgeElement ( elThead , true ) ; this . _destroyColumnHelpers ( ) ; elTable . removeChild ( elThead ) ; this . _elThead = null ; } }
Destroy's the DataTable THEAD element, if available.

@method _destroyTheadEl
@private
Destroy s the DataTable THEAD element if available .