elem.style[ name ] = options[ name ];
}

ret = callback.apply( elem, args || [] );

// Revert the old values
for ( name in options ) {
elem.style[ name ] = old[ name ];
}

return ret;
};


var
ralpha = /alpha\([^)]*\)/i,
ropacity = /opacity\s*=\s*([^)]*)/,

// swappable if display is none or starts with table except "table", "table-cell", or "table-caption"
// see here for display values: https://developer.mozilla.org/en-US/docs/CSS/display
rdisplayswap = /^(none|table(?!-c[ea]).+)/,
rnumsplit = new RegExp( "^(" + pnum + ")(.*)$", "i" ),
rrelNum = new RegExp( "^([+-])=(" + pnum + ")", "i" ),

cssShow = { position: "absolute", visibility: "hidden", display: "block" },
cssNormalTransform = {
letterSpacing: "0",
fontWeight: "400"
},

cssPrefixes = [ "Webkit", "O", "Moz", "ms" ];


// return a css property mapped to a potentially vendor prefixed property
function vendorPropName( style, name ) {

// shortcut for names that are not vendor prefixed
if ( name in style ) {
return name;
}

// check for vendor prefixed names
var capName = name.charAt(0).toUpperCase() + name.slice(1),
origName = name,
i = cssPrefixes.length;

while ( i-- ) {
name = cssPrefixes[ i ] + capName;
if ( name in style ) {
return name;
}
}

return origName;
}

function showHide( elements, show ) {
var display, elem, hidden,
values = [],
index = 0,
length = elements.length;

for ( ; index < length; index++ ) {
elem = elements[ index ];
if ( !elem.style ) {
continue;
}

values[ index ] = jQuery._data( elem, "olddisplay" );
display = elem.style.display;
if ( show ) {
// Reset the inline display of this element to learn if it is
// being hidden by cascaded rules or not
if ( !values[ index ] && display === "none" ) {
elem.style.display = "";
}

// Set elements which have been overridden with display: none
// in a stylesheet to whatever the default browser style is
// for such an element
if ( elem.style.display === "" && isHidden( elem ) ) {
values[ index ] = jQuery._data( elem, "olddisplay", defaultDisplay(elem.nodeName) );
}
} else {
hidden = isHidden( elem );

if ( display && display !== "none" || !hidden ) {
jQuery._data( elem, "olddisplay", hidden ? display : jQuery.css( elem, "display" ) );
}
}
}

// Set the display of most of the elements in a second loop
// to avoid the constant reflow
for ( index = 0; index < length; index++ ) {
elem = elements[ index ];
if ( !elem.style ) {
continue;
}
if ( !show || elem.style.display === "none" || elem.style.display === "" ) {
elem.style.display = show ? values[ index ] || "" : "none";
}
}

return elements;
}

function setPositiveNumber( elem, value, subtract ) {
var matches = rnumsplit.exec( value );
return matches ?
// Guard against undefined "subtract", e.g., when used as in cssHooks
Math.max( 0, matches[ 1 ] - ( subtract || 0 ) ) + ( matches[ 2 ] || "px" ) :
value;
}

function augmentWidthOrHeight( elem, name, extra, isBorderBox, styles ) {
var i = extra === ( isBorderBox ? "border" : "content" ) ?
// If we already have the right measurement, avoid augmentation
4 :
// Otherwise initialize for horizontal or vertical properties
name === "width" ? 1 : 0,

val = 0;

for ( ; i < 4; i += 2 ) {
// both box models exclude margin, so add it if we want it
if ( extra === "margin" ) {
val += jQuery.css( elem, extra + cssExpand[ i ], true, styles );
}

if ( isBorderBox ) {
// border-box includes padding, so remove it if we want content
if ( extra === "content" ) {
val -= jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );
}

// at this point, extra isn't border nor margin, so remove border
if ( extra !== "margin" ) {
val -= jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
}
} else {
// at this point, extra isn't content, so add padding
val += jQuery.css( elem, "padding" + cssExpand[ i ], true, styles );

// at this point, extra isn't content nor padding, so add border
if ( extra !== "padding" ) {
val += jQuery.css( elem, "border" + cssExpand[ i ] + "Width", true, styles );
}
}
}

return val;
}

function getWidthOrHeight( elem, name, extra ) {

// Start with offset property, which is equivalent to the border-box value
var valueIsBorderBox = true,
val = name === "width" ? elem.offsetWidth : elem.offsetHeight,
styles = getStyles( elem ),
isBorderBox = support.boxSizing && jQuery.css( elem, "boxSizing", false, styles ) === "border-box";

// some non-html elements return undefined for offsetWidth, so check for null/undefined
// svg - https://bugzilla.mozilla.org/show_bug.cgi?id=649285
// MathML - https://bugzilla.mozilla.org/show_bug.cgi?id=491668
if ( val <= 0 || val == null ) {
// Fall back to computed then uncomputed css if necessary
val = curCSS( elem, name, styles );
if ( val < 0 || val == null ) {
val = elem.style[ name ];
}

// Computed unit is not pixels. Stop here and return.
if ( rnumnonpx.test(val) ) {
return val;
}

// we need the check for style in case a browser which returns unreliable values
// for getComputedStyle silently falls back to the reliable elem.style
valueIsBorderBox = isBorderBox && ( support.boxSizingReliable() || val === elem.style[ name ] );

// Normalize "", auto, and prepare for extra
val = parseFloat( val ) || 0;
}

// use the active box-sizing model to add/subtract irrelevant styles
return ( val +
augmentWidthOrHeight(
elem,
name,
extra || ( isBorderBox ? "border" : "content" ),
valueIsBorderBox,
styles
)
) + "px";
}

jQuery.extend({
// Add in style property hooks for overriding the default
// behavior of getting and setting a style property
cssHooks: {
opacity: {
get: function( elem, computed ) {
if ( computed ) {
// We should always get a number back from opacity
var ret = curCSS( elem, "opacity" );