X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=src%2Foffset.js;h=f80574eeae562a4207c9c2a52c6a23bc55d2c51f;hb=1a14a38ff77839b2a71fbc3f3c0890ebe62438c7;hp=7ae9cb909f85d4e3b3157e0320cf061ae2654849;hpb=3776cbe314ac6f5081e998c3d5ac84d3fbc51872;p=jquery.git

diff --git a/src/offset.js b/src/offset.js
index 7ae9cb9..f80574e 100644
--- a/src/offset.js
+++ b/src/offset.js
@@ -2,16 +2,16 @@ if ( "getBoundingClientRect" in document.documentElement ) {
 	jQuery.fn.offset = function( options ) {
 		var elem = this[0];
 
-		if ( !elem || !elem.ownerDocument ) {
-			return null;
-		}
-
 		if ( options ) { 
-			return this.each(function() {
-				jQuery.offset.setOffset( this, options );
+			return this.each(function( i ) {
+				jQuery.offset.setOffset( this, options, i );
 			});
 		}
 
+		if ( !elem || !elem.ownerDocument ) {
+			return null;
+		}
+
 		if ( elem === elem.ownerDocument.body ) {
 			return jQuery.offset.bodyOffset( elem );
 		}
@@ -28,16 +28,16 @@ if ( "getBoundingClientRect" in document.documentElement ) {
 	jQuery.fn.offset = function( options ) {
 		var elem = this[0];
 
-		if ( !elem || !elem.ownerDocument ) {
-			return null;
-		}
-
 		if ( options ) { 
-			return this.each(function() {
-				jQuery.offset.setOffset( this, options );
+			return this.each(function( i ) {
+				jQuery.offset.setOffset( this, options, i );
 			});
 		}
 
+		if ( !elem || !elem.ownerDocument ) {
+			return null;
+		}
+
 		if ( elem === elem.ownerDocument.body ) {
 			return jQuery.offset.bodyOffset( elem );
 		}
@@ -121,7 +121,7 @@ jQuery.offset = {
 
 		body.removeChild( container );
 		body = container = innerDiv = checkDiv = table = td = null;
-		jQuery.offset.initialize = function() {};
+		jQuery.offset.initialize = jQuery.noop;
 	},
 
 	bodyOffset: function( body ) {
@@ -137,7 +137,7 @@ jQuery.offset = {
 		return { top: top, left: left };
 	},
 	
-	setOffset: function( elem, options ) {
+	setOffset: function( elem, options, i ) {
 		// set position first, in-case top/left are set even on static elem
 		if ( /static/.test( jQuery.curCSS( elem, "position" ) ) ) {
 			elem.style.position = "relative";
@@ -145,11 +145,16 @@ jQuery.offset = {
 		var curElem   = jQuery( elem ),
 			curOffset = curElem.offset(),
 			curTop    = parseInt( jQuery.curCSS( elem, "top",  true ), 10 ) || 0,
-			curLeft   = parseInt( jQuery.curCSS( elem, "left", true ), 10)  || 0,
-			props     = {
-				top:  (options.top  - curOffset.top)  + curTop,
-				left: (options.left - curOffset.left) + curLeft
-			};
+			curLeft   = parseInt( jQuery.curCSS( elem, "left", true ), 10 ) || 0;
+
+		if ( jQuery.isFunction( options ) ) {
+			options = options.call( elem, i, curOffset );
+		}
+
+		var props = {
+			top:  (options.top  - curOffset.top)  + curTop,
+			left: (options.left - curOffset.left) + curLeft
+		};
 		
 		if ( "using" in options ) {
 			options.using.call( elem, props );