public/javascripts/yui/container/container.js
function() {
            var e = document.createElement("button");
            e.style.height = "1px";
            e.style.width = "1px";
            e.style.position = "absolute";
            e.style.left = "-10000em";
            e.style.opacity = 0;
            e.tabIndex = -1;
            this.innerElement.appendChild(e);
            this._modalFocus = e;
        }
function() {
            var e = document.createElement("button");
            e.style.height = "1px";
            e.style.width = "1px";
            e.style.position = "absolute";
            e.style.left = "-10000em";
            e.style.opacity = 0;
            e.tabIndex = -1;
            this.innerElement.appendChild(e);
            this._modalFocus = e;
        }
function ( ) { var e = document . createElement ( "button" ) ; e . style . height = "1px" ; e . style . width = "1px" ; e . style . position = "absolute" ; e . style . left = "-10000em" ; e . style . opacity = 0 ; e . tabIndex = - 1 ; this . innerElement . appendChild ( e ) ; this . _modalFocus = e ; }
Creates a hidden focusable element, used to focus on,
to enforce modality for browsers in which focus cannot
be applied to the container box.

@method _createHiddenFocusElement
@private
Creates a hidden focusable element used to focus on to enforce modality for browsers in which focus cannot be applied to the container box .