offsetHeight

HTML (DHTML)

previous page next page

offsetHeight Property

Internet Development Index

Retrieves the height of the object relative to the layout or coordinate parent, as specified by the offsetParent property.

Syntax

HTMLN/A
Scripting[ iHeight = ] object.offsetHeight

Possible Values

iHeightInteger that receives the height, in pixels.

The property is read-only. The property has no default value.

Remarks

You can determine the location, width, and height of an object by using a combination of the offsetLeft, offsetTop, offsetHeight, and offsetWidth properties. These numeric properties specify the physical coordinates and dimensions of the object relative to the object's offset parent.

For more information about how to access the dimension and location of elements on the page through the Dynamic HTML (DHTML) Document Object Model (DOM), see Measuring Element Dimension and Location.

To comply with the Cascading Style Sheets, Level 1 (CSS1) Non-Microsoft link box model, Microsoft® Internet Explorer 6 and later calculate the height of objects differently when you use the !DOCTYPE declaration in your document to switch on standards-compliant mode. This difference may affect the value of the offsetHeight propety. When standards-compliant mode is switched on, the height property specifies the distance between the top and bottom edges of the bounding box that surrounds the object's content. When standards-compliant mode is not switched on, and with earlier versions of Internet Explorer, the height property also includes the border and padding belts that surround the object's bounding box. For more information, see CSS Enhancements in Internet Explorer 6.

Examples

This example adjusts the size of a clock's readout to fit the current width and height of the document body.

<HTML>
<HEAD>
<TITLE>A Simple Clock</TITLE>
<SCRIPT LANGUAGE="JScript">
function startClock()
{
window.setInterval("Clock_Tick()", 1000);
Clock_Tick();
}
var iRatio = 4;
function Clock_Tick()
{
var dToday = Date();
var sTime = dToday.substring(11,19);
var iDocHeight = document.body.offsetHeight;
var iDocWidth = document.body.offsetWidth;
if ((iDocHeight*iRatio)>iDocWidth)
iDocHeight = iDocWidth / iRatio;
document.all.MyTime.innerText = sTime;
document.all.MyTime.style.fontSize = iDocHeight;
}
</SCRIPT>
</HEAD>
<BODY onload="startClock()">
<P ID="MyTime">&nbsp;</P>
</BODY>
</HTML>

This example uses the offsetHeight property and the clientHeight property to show different ways of measuring the object size.

<DIV ID=oDiv STYLE="overflow:scroll; width:200; height:100"> . . . </DIV>
<BUTTON onclick="alert(oDiv.clientHeight)">client height</BUTTON>
<BUTTON onclick="alert(oDiv.offsetHeight)">offset height</BUTTON>
This feature requires Microsoft® Internet Explorer 4.0 or later. Click the following icon to install the latest version. Then reload this page to view the sample.

Standards Information

There is no public standard that applies to this property.

Applies To

A, ACRONYM, ADDRESS, APPLET, AREA, B, BDO, BIG, BLOCKQUOTE, BODY, BR, BUTTON, CAPTION, CENTER, CITE, CODE, COL, COLGROUP, CUSTOM, DD, DEL, DFN, DIR, DIV, DL, DT, EM, EMBED, FIELDSET, FONT, FORM, FRAME, hn, HR, I, IFRAME, IMG, INPUT type=button, INPUT type=checkbox, INPUT type=file, INPUT type=image, INPUT type=password, INPUT type=radio, INPUT type=reset, INPUT type=submit, INPUT type=text, INS, KBD, LABEL, LEGEND, LI, LISTING, MAP, MARQUEE, MENU, NOBR, OBJECT, OL, OPTION, P, PLAINTEXT, PRE, Q, RT, RUBY, S, SAMP, SELECT, SMALL, SPAN, STRIKE, STRONG, SUB, SUP, TABLE, TBODY, TD, TEXTAREA, TFOOT, TH, THEAD, TR, TT, U, UL, VAR, XMP
previous page start next page