public/javascripts/yui/container/container.js
function () {

            var oMask = this.mask,
                oParentNode;

            if (oMask) {
                /*
                    Hide the mask before destroying it to ensure that DOM
                    event handlers on focusable elements get removed.
                */
                this.hideMask();

                oParentNode = oMask.parentNode;
                if (oParentNode) {
                    oParentNode.removeChild(oMask);
                }

                this.mask = null;
            }
        }
function () {

            var oMask = this.mask,
                oParentNode;

            if (oMask) {
                /*
                    Hide the mask before destroying it to ensure that DOM
                    event handlers on focusable elements get removed.
                */
                this.hideMask();

                oParentNode = oMask.parentNode;
                if (oParentNode) {
                    oParentNode.removeChild(oMask);
                }

                this.mask = null;
            }
        }
function ( ) { var oMask = this . mask , oParentNode ; if ( oMask ) { /*
                    Hide the mask before destroying it to ensure that DOM
                    event handlers on focusable elements get removed.
                */ this . hideMask ( ) ; oParentNode = oMask . parentNode ; if ( oParentNode ) { oParentNode . removeChild ( oMask ) ; } this . mask = null ; } }
Removes the modality mask.
@method removeMask
Removes the modality mask .