public/javascripts/yui/container/container.js
function () {
            if (this.iframe) {
                var overlayZ = Dom.getStyle(this.element, "zIndex");
                if (!YAHOO.lang.isUndefined(overlayZ) && !isNaN(overlayZ)) {
                    Dom.setStyle(this.iframe, "zIndex", (overlayZ - 1));
                }
            }
        }
function () {
            if (this.iframe) {
                var overlayZ = Dom.getStyle(this.element, "zIndex");
                if (!YAHOO.lang.isUndefined(overlayZ) && !isNaN(overlayZ)) {
                    Dom.setStyle(this.iframe, "zIndex", (overlayZ - 1));
                }
            }
        }
function ( ) { if ( this . iframe ) { var overlayZ = Dom . getStyle ( this . element , "zIndex" ) ; if ( ! YAHOO . lang . isUndefined ( overlayZ ) && ! isNaN ( overlayZ ) ) { Dom . setStyle ( this . iframe , "zIndex" , ( overlayZ - 1 ) ) ; } } }
Sets the zindex of the iframe shim, if it exists, based on the zindex of
the Overlay element. The zindex of the iframe is set to be one less
than the Overlay element's zindex.

<p>NOTE: This method will not bump up the zindex of the Overlay element
to ensure that the iframe shim has a non-negative zindex.
If you require the iframe zindex to be 0 or higher, the zindex of
the Overlay element should be set to a value greater than 0, before
this method is called.
</p>
@method stackIframe
Sets the zindex of the iframe shim if it exists based on the zindex of the Overlay element . The zindex of the iframe is set to be one less than the Overlay element s zindex .