Introduction to Filters in IE 5.5 and Up: Scripting Filters

Introduction to Filters in IE 5.5 and Up

Scripting Filters

The filters attached to an object are grouped under the filters collection. The filters collection can be accessed like any other object collection. One method is through the filter index in the collection. To enable the first filter, for example, of an object with ID=mydiv, you can use the item array:

mydiv.filters.item(0).enabled = true;

Another method is to specify the item's index by its name. Let's take our previous example and add a little script that will enable the DropShadow filter and disable the Engrave filter. Here is the code, followed by its result:

<DIV ID="mydiv" STYLE="width: 40%; filter:
 progid:DXImageTransform.Microsoft.engrave()
 progid:DXImageTransform.Microsoft.DropShadow(color='red',
 OffX=3, OffY=2)">
<IMAGE SRC="bicycle.gif"><FONT COLOR="blue">In this page we explain
 the basics of using filters.</FONT>
</DIV>
<SCRIPT LANGUAGE="JavaScript">
<!--
mydiv.filters.item(1).enabled = 1;
mydiv.filters.item("DXImageTransform.Microsoft.engrave").enabled = 0;
// -->
</SCRIPT>

Notice that the Engrave filter is disabled in the script, and indeed the DIV element is not engraved.

Each filter supports its own properties and methods. The filter's properties are set during its definition and can be modified by a script. Let's modify the shadow color above from red to tan, inside the script:

<DIV ID="mydiv1" STYLE="width: 40%; filter:
 progid:DXImageTransform.Microsoft.engrave()
 progid:DXImageTransform.Microsoft.DropShadow(color='red',
 OffX=3, OffY=2)">
<IMAGE SRC="bicycle.gif"><FONT COLOR="blue">In this page we explain
 the basics of using filters.</FONT>
</DIV>
<SCRIPT LANGUAGE="JavaScript">
<!--
mydiv1.filters.item(1).enabled = 1;
mydiv1.filters.item("DXImageTransform.Microsoft.engrave").enabled = 0;
mydiv1.filters.item("DXImageTransform.Microsoft.dropshadow").color
 = "tan";
// -->
</SCRIPT>

Next: How to use the filter property

Produced by Yehuda Shiran and Tomer Shiran
All Rights Reserved. Legal Notices.
Created: September 11, 2000
Revised: September 11, 2000

URL: https://www.webreference.com/js/column68/4.html