gf3/defaultDisplay-jQuery.js

## defaultDisplay-jQuery.js
var elemDisplays = {},
    // Store the iframe outside the function to reuse it
    iframe;

function defaultDisplay( nodeName ) {
	if ( !elemDisplays[ nodeName ] ) {
		// Try the classical method first, which is far faster
		var elem = document.createElement( nodeName ),
		    display;
		document.body.appendChild( elem );
		display = window.getComputedStyle( elem ).getPropertyValue( "display" );
		document.body.removeChild( elem );

		// if the display value is "none", use an iframe
		if ( display === "none" || display === "false" ) {
			// No iframe to use yet, so create it
			if ( !iframe ) {
				iframe = document.createElement( "iframe" );
				iframe.frameBorder = iframe.width = iframe.height = 0;
			}

			document.body.appendChild( iframe );

			/* Create a cacheable copy of the iframe document on
			 * first call.
			 * IE and Opera will allow us to reuse the iframeDoc
			 * without re-writing the fake html document to it,
			 * WebKit & Firefox won't allow reusing the iframe document
			 */
			if ( !iframeDoc || !iframe.createElement ) {
				iframeDoc = ( iframe.contentWindow || iframe.contentDocument ).document;
				iframeDoc.write( "<!doctype><html><body></body></html>" );
			}

			elem = iframeDoc.createElement( nodeName );

			iframeDoc.body.appendChild( elem );

			display = jQuery.css( elem, "display" );

			document.body.removeChild( iframe );
		}
		elemDisplays[ nodeName ] = display;
	}
	return elemDisplays[ nodeName ];
}

## defaultDisplay-sans-jQuery.js
var elemDisplays = {},
    // Store the iframe outside the function to reuse it
    iframe,
    iframeDoc;

function defaultDisplay( nodeName ) {
	if ( !elemDisplays[ nodeName ] ) {
		// Try the classical method first, which is far faster
		var elem = document.createElement( nodeName ),
		    display;
		document.body.appendChild( elem );
		display = elem.ownerDocument.defaultView ? window.getComputedStyle( elem ).getPropertyValue( "display" ) : "none";
		document.body.removeChild( elem );

		// if the display value is "none", use an iframe
		if ( display === "none" || display === "false" ) {
			// No iframe to use yet, so create it
			if ( !iframe ) {
				iframe = document.createElement( "iframe" );
				iframe.frameBorder = iframe.width = iframe.height = 0;
			}

			document.body.appendChild( iframe );

			/* Create a cacheable copy of the iframe document on
			 * first call.
			 * IE and Opera will allow us to reuse the iframeDoc
			 * without re-writing the fake html document to it,
			 * WebKit & Firefox won't allow reusing the iframe document
			 */
			if ( !iframeDoc || !iframe.createElement ) {
				iframeDoc = ( iframe.contentWindow || iframe.contentDocument ).document;
				iframeDoc.write( "<!doctype html><html><body>" );
				iframeDoc.close();
			}

			elem = iframeDoc.createElement( nodeName );

			iframeDoc.body.appendChild( elem );

			if ( document.defaultView && document.defaultView.getComputedStyle ) {
				display = elem.ownerDocument.defaultView.getComputedStyle( elem, null ).getPropertyValue( 'display' );
				if ( display == "" ) {
					display = elem.style.display;
				}
			} else if ( document.documentElement.currentStyle ) {
				display = elem.currentStyle[ 'display' ];
			} else {
				display = elem.style.display;
			}

			document.body.removeChild( iframe );
		}
		elemDisplays[ nodeName ] = display;
	}
	return elemDisplays[ nodeName ];
}
	var elemDisplays = {},
	// Store the iframe outside the function to reuse it
	iframe;

	function defaultDisplay( nodeName ) {
	if ( !elemDisplays[ nodeName ] ) {
	// Try the classical method first, which is far faster
	var elem = document.createElement( nodeName ),
	display;
	document.body.appendChild( elem );
	display = window.getComputedStyle( elem ).getPropertyValue( "display" );
	document.body.removeChild( elem );

	// if the display value is "none", use an iframe
	if ( display === "none" \|\| display === "false" ) {
	// No iframe to use yet, so create it
	if ( !iframe ) {
	iframe = document.createElement( "iframe" );
	iframe.frameBorder = iframe.width = iframe.height = 0;
	}

	document.body.appendChild( iframe );

	/* Create a cacheable copy of the iframe document on
	* first call.
	* IE and Opera will allow us to reuse the iframeDoc
	* without re-writing the fake html document to it,
	* WebKit & Firefox won't allow reusing the iframe document
	*/
	if ( !iframeDoc \|\| !iframe.createElement ) {
	iframeDoc = ( iframe.contentWindow \|\| iframe.contentDocument ).document;
	iframeDoc.write( "<!doctype><html><body></body></html>" );
	}

	elem = iframeDoc.createElement( nodeName );

	iframeDoc.body.appendChild( elem );

	display = jQuery.css( elem, "display" );

	document.body.removeChild( iframe );
	}
	elemDisplays[ nodeName ] = display;
	}
	return elemDisplays[ nodeName ];
	}
	var elemDisplays = {},
	// Store the iframe outside the function to reuse it
	iframe,
	iframeDoc;

	function defaultDisplay( nodeName ) {
	if ( !elemDisplays[ nodeName ] ) {
	// Try the classical method first, which is far faster
	var elem = document.createElement( nodeName ),
	display;
	document.body.appendChild( elem );
	display = elem.ownerDocument.defaultView ? window.getComputedStyle( elem ).getPropertyValue( "display" ) : "none";
	document.body.removeChild( elem );

	// if the display value is "none", use an iframe
	if ( display === "none" \|\| display === "false" ) {
	// No iframe to use yet, so create it
	if ( !iframe ) {
	iframe = document.createElement( "iframe" );
	iframe.frameBorder = iframe.width = iframe.height = 0;
	}

	document.body.appendChild( iframe );

	/* Create a cacheable copy of the iframe document on
	* first call.
	* IE and Opera will allow us to reuse the iframeDoc
	* without re-writing the fake html document to it,
	* WebKit & Firefox won't allow reusing the iframe document
	*/
	if ( !iframeDoc \|\| !iframe.createElement ) {
	iframeDoc = ( iframe.contentWindow \|\| iframe.contentDocument ).document;
	iframeDoc.write( "<!doctype html><html><body>" );
	iframeDoc.close();
	}

	elem = iframeDoc.createElement( nodeName );

	iframeDoc.body.appendChild( elem );

	if ( document.defaultView && document.defaultView.getComputedStyle ) {
	display = elem.ownerDocument.defaultView.getComputedStyle( elem, null ).getPropertyValue( 'display' );
	if ( display == "" ) {
	display = elem.style.display;
	}
	} else if ( document.documentElement.currentStyle ) {
	display = elem.currentStyle[ 'display' ];
	} else {
	display = elem.style.display;
	}

	document.body.removeChild( iframe );
	}
	elemDisplays[ nodeName ] = display;
	}
	return elemDisplays[ nodeName ];
	}