Using the offsetParent Property : Table « HTML « JavaScript DHTML






  1. JavaScript DHTML
  2. HTML
  3. Table

Using the offsetParent Property

 


/*
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.java2s.com/style/logo.png" HEIGHT=12 WIDTH=12></DIV>
</BODY>
</HTML>








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