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PUBLIC:ATTACH Element

Binds a function to an event, so that the function is called whenever the event fires on the specified object.

Syntax

<PUBLIC:ATTACH
    EVENT = "sEvent"
    FOR = "sObject"
    ID = "sID"
    ONEVENT = "sEventHandler"/>

Attributes

EVENT
Required. String that specifies the name of a Dynamic HTML (DHTML) event, or any of the events specific to the HTML Component (HTC) that are listed in the HTC Reference.
FOR
Optional. String that specifies one of the following values to identify the source of the event.
documentRefers to the document object.
elementDefault. Refers to the element to which the behavior is attached.
windowRefers to the window object.
ID
Optional. String that uniquely identifies the PUBLIC:ATTACH element within the component. This attribute is analogous to the ID attribute in DHTML.
ONEVENT
Required. String that specifies an inline script or a direct invocation of the event handler function.

Element Information

Parent elements PUBLIC:COMPONENT
Child elements None
Minimum availability Internet Explorer 5
Minimum operating systems Windows 95, Windows NT 4.0

Remarks

The PUBLIC:ATTACH element is a declarative form of the attachEvent method.

When the specified event fires on the element to which the behavior is attached, the element's event handler is called first, before the behavior's. If multiple behaviors are attached to an element and multiple event handlers are defined for the same event on the same element, the functions are called in random order, immediately after the element's event handler is called.

When providing a value for ONEVENT, avoid assigning the event handler function the name of an existing DHTML event. Using an existing DHTML event name might cause recursion errors.

Event names are case-sensitive for all scripted languages.

Example

This example uses an HTC to implement a table of contents that expands and collapses. The HTC attaches to the element's onclick event, and then expands or collapses the list each time the onclick event is received.


<PUBLIC:PROPERTY NAME="child" />
<PUBLIC:ATTACH EVENT="onclick" ONEVENT="ExpandCollapse()" />

<SCRIPT LANGUAGE="JScript">
function ExpandCollapse()
{
   var i;
   var sDisplay;

   // Determine current state of the list (expanded or collapsed)
   // based on the current display property of the child.
   bCollapsed = (element.document.all(child).style.display == "none");

   if (bCollapsed)
   {
      style.listStyleImage = "url('/workshop/graphics/blueminus.gif')";
      element.document.all(child).style.display = "";
   }
   else
   {
      style.listStyleImage = "url('/workshop/graphics/blueplus.gif')";
      element.document.all(child).style.display = "none";
   }
}
</SCRIPT>

Code example: http://samples.msdn.microsoft.com/workshop/samples/components/htc/toc/toc.htm

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