+
+
+jQuery.fn.extend({
+ position: function() {
+ if ( !this[0] ) {
+ return null;
+ }
+
+ var elem = this[0],
+
+ // Get *real* offsetParent
+ offsetParent = this.offsetParent(),
+
+ // Get correct offsets
+ offset = this.offset(),
+ parentOffset = rroot.test(offsetParent[0].nodeName) ? { top: 0, left: 0 } : offsetParent.offset();
+
+ // Subtract element margins
+ // note: when an element has margin: auto the offsetLeft and marginLeft
+ // are the same in Safari causing offset.left to incorrectly be 0
+ offset.top -= parseFloat( jQuery.css(elem, "marginTop") ) || 0;
+ offset.left -= parseFloat( jQuery.css(elem, "marginLeft") ) || 0;
+
+ // Add offsetParent borders
+ parentOffset.top += parseFloat( jQuery.css(offsetParent[0], "borderTopWidth") ) || 0;
+ parentOffset.left += parseFloat( jQuery.css(offsetParent[0], "borderLeftWidth") ) || 0;
+
+ // Subtract the two offsets
+ return {
+ top: offset.top - parentOffset.top,
+ left: offset.left - parentOffset.left
+ };
+ },
+
+ offsetParent: function() {
+ return this.map(function() {
+ var offsetParent = this.offsetParent || document.body;
+ while ( offsetParent && (!rroot.test(offsetParent.nodeName) && jQuery.css(offsetParent, "position") === "static") ) {
+ offsetParent = offsetParent.offsetParent;
+ }
+ return offsetParent;
+ });
+ }
+});
+
+
+// Create scrollLeft and scrollTop methods
+jQuery.each( ["Left", "Top"], function( i, name ) {
+ var method = "scroll" + name;
+
+ jQuery.fn[ method ] = function(val) {
+ var elem = this[0], win;
+
+ if ( !elem ) {
+ return null;
+ }
+
+ if ( val !== undefined ) {
+ // Set the scroll offset
+ return this.each(function() {
+ win = getWindow( this );
+
+ if ( win ) {
+ win.scrollTo(
+ !i ? val : jQuery(win).scrollLeft(),
+ i ? val : jQuery(win).scrollTop()
+ );
+
+ } else {
+ this[ method ] = val;
+ }
+ });
+ } else {
+ win = getWindow( elem );
+
+ // Return the scroll offset
+ return win ? ("pageXOffset" in win) ? win[ i ? "pageYOffset" : "pageXOffset" ] :
+ jQuery.support.boxModel && win.document.documentElement[ method ] ||
+ win.document.body[ method ] :
+ elem[ method ];
+ }
+ };
+});
+
+function getWindow( elem ) {
+ return jQuery.isWindow( elem ) ?
+ elem :
+ elem.nodeType === 9 ?
+ elem.defaultView || elem.parentWindow :
+ false;
+}
+
+})( jQuery );