Little correction in <jQuery.fn.offset> for using jquery effects while asp.net postbacks

Little correction in <jQuery.fn.offset> for using jquery effects while asp.net postbacks


jQuery.fn.offset = function() {
var left = 0, top = 0, elem = this[0], results;
if (elem) with (jQuery.browser) {
var parent = elem.parentNode,
         offsetChild = elem,
         offsetParent = function IESafeOffsetParent(elem) { try { return
elem.offsetParent; } catch (e) { return document.body; } }, //first
modification !!!
         doc = elem.ownerDocument,
         safari2 = safari && parseInt(version) < 522 && !/adobeair/i.test
(userAgent),
         css = jQuery.curCSS,
         fixed = css(elem, "position") == "fixed";
// Use getBoundingClientRect if available
if (elem.getBoundingClientRect) {
//second modification !!!
try {
box = elem.getBoundingClientRect();
}
catch (ex) {
return [0, 0];
}
// Add the document scroll offsets
add(box.left + Math.max
(doc.documentElement.scrollLeft, doc.body.scrollLeft),
                box.top + Math.max(doc.documentElement.scrollTop,
doc.body.scrollTop));
// IE adds the HTML element's border, by default it is
medium which is 2px
// IE 6 and 7 quirks mode the border width is
overwritable by the following css html { border: 0; }
// IE 7 standards mode, the border is always 2px
// This border/offset is typically represented by the
clientLeft and clientTop properties
// However, in IE6 and 7 quirks mode the clientLeft
and clientTop properties are not updated when overwriting it via CSS
// Therefore this method will be off by 2px in IE
while in quirksmode
add(-doc.documentElement.clientLeft, -
doc.documentElement.clientTop);
// Otherwise loop through the offsetParents and
parentNodes
} else {
// Initial element offsets
add(elem.offsetLeft, elem.offsetTop);
// Get parent offsets
while (offsetParent) {
// Add offsetParent offsets
add(offsetParent.offsetLeft,
offsetParent.offsetTop);
// Mozilla and Safari > 2 does not include the
border on offset parents
// However Mozilla adds the border for table or
table cells
if (mozilla && !/^t(able|d|h)$/i.test
(offsetParent.tagName) || safari && !safari2)
border(offsetParent);
// Add the document scroll offsets if position is
fixed on any offsetParent
if (!fixed && css(offsetParent, "position") ==
"fixed")
fixed = true;
// Set offsetChild to previous offsetParent unless
it is the body element
offsetChild = /^body$/i.test
(offsetParent.tagName) ? offsetChild : offsetParent;
// Get next offsetParent
offsetParent = offsetParent.offsetParent;
}
// Get parent scroll offsets
while (parent && parent.tagName && !/^body|html$/i.test
(parent.tagName)) {
// Remove parent scroll UNLESS that parent is
inline or a table to work around Opera inline/table scrollLeft/Top bug
if (!/^inline|table.*$/i.test(css(parent,
"display")))
// Subtract parent scroll offsets
add(-parent.scrollLeft, -parent.scrollTop);
// Mozilla does not add the border for a parent
that has overflow != visible
if (mozilla && css(parent, "overflow") !=
"visible")
border(parent);
// Get next parent
parent = parent.parentNode;
}
// Safari <= 2 doubles body offsets with a fixed
position element/offsetParent or absolutely positioned offsetChild
// Mozilla doubles body offsets with a non-absolutely
positioned offsetChild
if ((safari2 && (fixed || css(offsetChild, "position")
== "absolute")) ||
                (mozilla && css(offsetChild, "position") != "absolute"))
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
results = { top: top, left: left };
}
function border(elem) {
add(jQuery.curCSS(elem, "borderLeftWidth", true),
jQuery.curCSS(elem, "borderTopWidth", true));
}
function add(l, t) {
left += parseInt(l, 10) || 0;
top += parseInt(t, 10) || 0;
}
return results;
};