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@dewski
Created August 20, 2012 06:32
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jQuery.fn.offset = function( options ) {
if ( arguments.length ) {
return options === undefined ?
this :
this.each(function( i ) {
jQuery.offset.setOffset( this, options, i );
});
}
var box, docElem, body, win, clientTop, clientLeft, scrollTop, scrollLeft, top, left,
elem = this[ 0 ],
doc = elem && elem.ownerDocument;
if ( !doc ) {
return;
}
if ( (body = doc.body) === elem ) {
return jQuery.offset.bodyOffset( elem );
}
docElem = doc.documentElement;
// Make sure we're not dealing with a disconnected DOM node
if ( !jQuery.contains( docElem, elem ) ) {
return { top: 0, left: 0 };
}
box = elem.getBoundingClientRect();
win = getWindow( doc );
clientTop = docElem.clientTop || body.clientTop || 0;
clientLeft = docElem.clientLeft || body.clientLeft || 0;
scrollTop = win.pageYOffset || docElem.scrollTop;
scrollLeft = win.pageXOffset || docElem.scrollLeft;
top = box.top + scrollTop - clientTop;
left = box.left + scrollLeft - clientLeft;
return { top: top, left: left };
};
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