var elem = this[0];
if ( !elem ) return null;
if ( elem === elem.ownerDocument.body ) return jQuery.offset.bodyOffset( elem );
- jQuery.offset.initialized || jQuery.offset.initialize();
+ jQuery.offset.initialize();
var offsetParent = elem.offsetParent, prevOffsetParent = elem,
doc = elem.ownerDocument, computedStyle, docElem = doc.documentElement,
top = elem.offsetTop, left = elem.offsetLeft;
while ( (elem = elem.parentNode) && elem !== body && elem !== docElem ) {
+ if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" ) break;
computedStyle = defaultView.getComputedStyle(elem, null);
top -= elem.scrollTop, left -= elem.scrollLeft;
if ( elem === offsetParent ) {
top += body.offsetTop,
left += body.offsetLeft;
- if ( prevComputedStyle.position === "fixed" )
+ if ( jQuery.offset.supportsFixedPosition && prevComputedStyle.position === "fixed" )
top += Math.max(docElem.scrollTop, body.scrollTop),
left += Math.max(docElem.scrollLeft, body.scrollLeft);
jQuery.offset = {
initialize: function() {
- if ( this.initialized ) return;
var body = document.body, container = document.createElement('div'), innerDiv, checkDiv, table, td, prop, bodyMarginTop = body.style.marginTop,
html = '<div style="position:absolute;top:0;left:0;margin:0;border:5px solid #000;padding:0;width:1px;height:1px;"><div></div></div><table style="position:absolute;top:0;left:0;margin:0;border:5px solid #000;padding:0;width:1px;height:1px;" cellpadding="0" cellspacing="0"><tr><td></td></tr></table>';
this.doesNotAddBorder = (checkDiv.offsetTop !== 5);
this.doesAddBorderForTableAndCells = (td.offsetTop === 5);
+ checkDiv.style.position = 'fixed', checkDiv.style.top = '20px';
+ this.supportsFixedPosition = (checkDiv.offsetTop >= 15); // safari subtracts parent border width here which is 5px
+ checkDiv.style.position = '', checkDiv.style.top = '';
+
innerDiv.style.overflow = 'hidden', innerDiv.style.position = 'relative';
this.subtractsBorderForOverflowNotVisible = (checkDiv.offsetTop === -5);
body.style.marginTop = bodyMarginTop;
body.removeChild(container);
- this.initialized = true;
+ jQuery.offset.initialize = function(){};
},
bodyOffset: function(body) {
- jQuery.offset.initialized || jQuery.offset.initialize();
+ jQuery.offset.initialize();
var top = body.offsetTop, left = body.offsetLeft;
if ( jQuery.offset.doesNotIncludeMarginInBodyOffset )
top += parseFloat( jQuery.curCSS(body, 'marginTop', true), 10 ) || 0,