+// The Offset Method
+// Originally By Brandon Aaron, part of the Dimension Plugin
+// http://jquery.com/plugins/project/dimensions
jQuery.fn.offset = function() {
var left = 0, top = 0, elem = this[0], results;
if ( elem ) with ( jQuery.browser ) {
- var absolute = jQuery.css(elem, "position") == "absolute",
- parent = elem.parentNode,
- offsetParent = elem.offsetParent,
- doc = elem.ownerDocument,
- safari2 = safari && !absolute && parseInt(version) < 522;
+ var parent = elem.parentNode,
+ offsetParent = elem.offsetParent,
+ doc = elem.ownerDocument,
+ safari2 = safari && parseInt(version) < 522,
+ position = jQuery.css(elem, "position"),
+ absolute = position == "absolute",
+ fixed = position == "fixed";
// Use getBoundingClientRect if available
if ( elem.getBoundingClientRect ) {
- box = elem.getBoundingClientRect();
+ var box = elem.getBoundingClientRect();
// Add the document scroll offsets
add(
// However Mozilla adds the border for table cells
if ( mozilla && /^t[d|h]$/i.test(parent.tagName) || !safari2 )
border( offsetParent );
+
+ // Get offsetParent's position
+ position = jQuery.css(offsetParent, "position");
// Safari <= 2 doubles body offsets with an absolutely positioned element or parent
- if ( safari2 && !absolute && jQuery.css(offsetParent, "position") == "absolute" )
+ if ( safari2 && !absolute && position == "absolute" )
absolute = true;
+
+ // Opera adds border for fixed, relative and absolute parent elements
+ if (opera && /^fixed|relative|absolute$/i.test(position))
+ add(
+ -parseInt(jQuery.css(elem, "borderLeftWidth")),
+ -parseInt(jQuery.css(elem, "borderTopWidth"))
+ );
+
+ // Add the document scroll offsets if position is fixed
+ if ( !fixed && position == "fixed" )
+ fixed = true;
// Get next offsetParent
offsetParent = offsetParent.offsetParent;
}
// Get parent scroll offsets
- while ( parent.tagName && /^body|html$/i.test(parent.tagName) ) {
+ while ( parent.tagName && !/^body|html$/i.test(parent.tagName) ) {
// Work around opera inline/table scrollLeft/Top bug
- if ( /^inline|table-row.*$/i.test(jQuery.css(parent, "display")) )
+ if ( !/^inline|table-row.*$/i.test(jQuery.css(parent, "display")) )
// Subtract parent scroll offsets
add( -parent.scrollLeft, -parent.scrollTop );
parent = parent.parentNode;
}
- // Safari doubles body offsets with an absolutely positioned element or parent
- if ( safari && absolute )
+ // Safari <= 2 doubles body offsets with an absolute or fixed positioned element or parent
+ if ( safari2 && (absolute || fixed) )
add( -doc.body.offsetLeft, -doc.body.offsetTop );
+
+ // Add the document scroll offsets if position is fixed
+ if ( fixed )
+ add(
+ Math.max(doc.documentElement.scrollLeft, doc.body.scrollLeft),
+ Math.max(doc.documentElement.scrollTop, doc.body.scrollTop)
+ );
}
// Return an object with top and left properties
function add(l, t) {
left += parseInt(l) || 0;
- top += parseInt(t) || 0;
+ top += parseInt(t) || 0;
}
};