doScroll Method

DHTML, HTML, & CSS

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DHTML Methods

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doScroll Method

Simulates a click on a scroll-bar component.

Syntax

object.doScroll([sScrollAction])

Parameters

sScrollAction Optional. String that specifies how the object scrolls, using one of the following values:

scrollbarDown Default. Down scroll arrow is at the specified location.

scrollbarHThumb Horizontal scroll thumb or box is at the specified location. scrollbarLeft Left scroll arrow is at the specified location. scrollbarPageDown Page-down scroll bar shaft is at the specified location. scrollbarPageLeft Page-left scroll bar shaft is at the specified location. scrollbarPageRight Page-right scroll bar shaft is at the specified location. scrollbarPageUp Page-up scroll bar shaft is at the specified location. scrollbarRight Right scroll arrow is at the specified location. scrollbarUp Up scroll arrow is at the specified location. scrollbarVThumb Vertical scroll thumb or box is at the specified location.
down Composite reference to scrollbarDown.

left Composite reference to scrollbarLeft.

pageDown Composite reference to scrollbarPageDown.

pageLeft Composite reference to scrollbarPageLeft.

pageRight Composite reference to scrollbarPageRight.

pageUp Composite reference to scrollbarPageUp.

right Composite reference to scrollbarRight.

up Composite reference to scrollbarUp.

Return Value

No return value.

Remarks

Cascading style sheets (CSS) allow you to scroll on all objects through the overflow property.

When the content of an element changes and causes scroll bars to display, the doScroll method might not work correctly immediately following the content update. When this happens, you can use the setTimeout method to enable the browser to recognize the dynamic changes that affect scrolling.

Example

This example uses the doScroll method to scroll through a text area when the user clicks a button.

Sample Code
<HEAD>
<SCRIPT>  
function scrollBehavior()
{
document.body.doScroll("scrollbarPageRight");
}

function scrollBehavior1()
{
txtScrollMe.doScroll("scrollbarDown");
}

function scrollBehavior2()
{
txtScrollMe.doScroll("scrollbarPageDown");
}
</SCRIPT>
</HEAD>
<BODY>
<BUTTON
   onclick="scrollBehavior()"
   CLASS="colorIt"
>
Click to Scroll Page
</BUTTON>
<BR>
<HR>
<BUTTON
   onclick="scrollBehavior1()"
   ondblclick="scrollBehavior2()"
   CLASS="colorIt">
   Click to Scroll Text Area
</BUTTON><BR><BR>
<TEXTAREA ID=txtScrollMe CLASS="colorIt">
    This text area
    will scroll downward when the
    "Click to Scroll the Text Area"
    button is clicked. The doScroll method 
    will scroll it as if the down arrow
    component of the scroll bar had 
    been clicked. Double-click the
    button to scroll down a whole page.
</BODY>
This feature requires Microsoft® Internet Explorer 5 or later. Click the icon below to install the latest version. Then reload this page to view the sample.

This example uses the doScroll method to scroll down a text area in one-second intervals.
<HEAD>
<SCRIPT>
var iTimer;
function timeIt()
{
iTimer = setInterval("scrollIt()", 1000);
}
function scrollIt()
{
oScrollMe.doScroll("down");
}
</SCRIPT>
</HEAD>
<BODY onload="timeIt()">
<DIV ID=oScrollMe STYLE="width:200px;height:75px;overflow:scroll">

</DIV>
</BODY>
This feature requires Internet Explorer 5 or later. Click the icon below to install the latest version. Then reload this page to view the sample.

Applies To

[ Object Name ]

Platform Version

Win16:

Win32:

Mac:

Unix:

WinCE:

Version data is listed when the mouse hovers over a link, or the link has focus.

BODY, custom, DIV, SPAN, TEXTAREA