Mega Code Archive
Using the offsetParent Property
<![CDATA[
/*
JavaScript Bible, Fourth Edition
by Danny Goodman
John Wiley & Sons CopyRight 2001
*/
<HTML>
<HEAD>
<TITLE>offsetParent Property</TITLE>
<SCRIPT LANGUAGE="JavaScript">
function setImagePosition(){
var cElement = document.all.myCell
// Set flag for whether calculations should use
// client- or offset- property measures. Use
// client- for IE5/Mac and IE4/Windows; otherwise
// use offset- properties. An ugly, but necessary
// workaround.
var useClient = (cElement.offsetTop == 0) ?
((cElement.offsetParent.tagName == "TR") ? false : true) : false
if (useClient) {
var x = cElement.clientLeft
var y = cElement.clientTop
} else {
var x = cElement.offsetLeft
var y = cElement.offsetTop
}
var pElement = document.all.myCell.offsetParent
while (pElement != document.body) {
if (useClient) {
x += pElement.clientLeft
y += pElement.clientTop
} else {
x += pElement.offsetLeft
y += pElement.offsetTop
}
pElement = pElement.offsetParent
}
document.all.myDIV.style.pixelLeft = x
document.all.myDIV.style.pixelTop = y
document.all.myDIV.style.visibility = "visible"
}
</SCRIPT>
</HEAD>
<BODY onload="setImagePosition()">
<SCRIPT LANGUAGE="JavaScript">
</SCRIPT>
<H1>The offsetParent Property</H1>
<HR>
<P>After the document loads, the script positions a small image in the upper
left corner of the second table cell.</P>
<TABLE BORDER=1 ALIGN="center">
<TR>
<TD>This is the first cell</TD>
<TD ID="myCell">This is the second cell.</TD>
</TR>
</TABLE>
<DIV ID="myDIV" STYLE="position:absolute; visibility:hidden; height:12; width:12">
<IMG SRC="http://www.rntsoft.com/style/logo.png" HEIGHT=12 WIDTH=12></DIV>
</BODY>
</HTML>
]]>