AlphaImageLoader Filter

Displays an image within the boundaries of the object and between the object background and content, with options to clip or resize the image. When loading a Portable Network Graphics (PNG) image, tranparency—from zero to 100 percent—is supported.

dhtml语法

HTML	<ELEMENT STYLE= "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(sProperties)" ... >	Internet Explorer 5.5 or later
Scripting	object.style.filter = "progid:dximagetransform.microsoft.alphaimageloader(sproperties)"	Internet Explorer 5.5 or later

DHTML可能的值

sProperties

String that specifies one or more properties exposed by the filter.

Members Table

The following table lists the members exposed by the AlphaImageLoader object. Click a tab on the left to choose the type of member you want to view.

Attributes/Properties

Attribute	Property	Description
enabled	Enabled	Sets or retrieves a value that indicates whether the filter is enabled.
sizingmethod	sizingMethod	Sets or retrieves the manner in which to display an image within the boundary of the object that the AlphaImageLoader filter is applied to.
src	src	Sets or retrieves the URL of an image that the AlphaImageLoader filter loads.

Remarks

The src property has no default and must be defined for this filter to affect the object's display.

transparency for png images is respected during text selection. this means the user can select content that is displayed behind the fully transparent region of a png image.

the object that the filter is applied to must have layout before the filter effect will display. you can give the object layout by setting the height or width property, setting the position property to absolute, setting the writingmode property to tb-rl, or setting the contenteditable property to true.

you can assign multiple filters or transitions to an object by declaring each in the filter property of the object. the following div declaration assigns two filters and a Wheel transition to a div element.

<DIV STYLE="width:100%; filter:
progid_DXImageTransform.Microsoft.MotionBlur(strength=13, direction=310)
progid_DXImageTransform.Microsoft.Blur(pixelradius=2)
progid_DXImageTransform.Microsoft.Wheel(duration=3);">
Blurry text with smudge of gray.</div>     

When multiple filters are applied to an object, each filter is processed in source order, with the exception of procedural surfaces, which are computed first. To emphasize a filter's effect, place it last in source order or on the object's parent. Always place transitions last in source order.

DHTML代码范例

This example loads a div element with an image expanded to a 250-pixel square. Using the sizingmethod property, the button causes the image to change between the default, 100-pixel size and the expanded, 250-pixel size. the filters collection is used to reference the div element's filter properties. to use this sample code a valid image path must be placed in the src property of the alphaimageloader filter.

<SCRIPT>
var bToggle = 1
<!-- Toggle the sizingMethod property to resize the image.  -->
function fnToggle(oObj) {
if (bToggle) {
bToggle = 0;
oDiv.filters(0).sizingMethod="image";
oObj.innerText='Enlarge It';}
else {
bToggle = 1;
oDiv.filters(0).sizingMethod="scale";
oObj.innerText='Make Normal';}
}
</SCRIPT>
<!-- This DIV is the target container for the image.  -->
<DIV ID="oDiv" STYLE="position:relative; height:250px; width:250px;
filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(
src='../common/earglobe.gif', sizingMethod='scale');" >
</DIV>
<BR><BUTTON onclick="fnToggle(this);">Make Normal</BUTTON>

This feature requires Microsoft® Internet Explorer 5.5 or later. Click the following icon to install the latest version. Then reload this page to view the sample.

applies to

A, ACRONYM, ADDRESS, B, BDO, BIG, BLOCKQUOTE, BODY, BUTTON, CAPTION, CENTER, CITE, CODE, CUSTOM, DD, DEL, DFN, DIR, DIV, DL, DT, EM, FIELDSET, FONT, FORM, FRAME, hn, IFRAME, I, INS, 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, KBD, LABEL, LEGEND, LI, MARQUEE, MENU, NOBR, OL, OBJECT, P, PLAINTEXT, PRE, Q, RT, RUBY, S, SAMP, SMALL, SPAN, STRIKE, STRONG, SUB, SUP, TABLE, TEXTAREA, TH, TD, TT, U, UL, VAR, XMP