DomEvents in ASP.NET AJAX

In my previous article Avoid Numbers in Textbox using ASP.NET AJAX, I showed how you can prevent numbers from being entered into a Textbox, using ASP.NET AJAX Framework.

In that example, the code segment e.charCod  and preventDefault() designates a property belonging to Sys.UI.DomEvent class. The Sys.UI is the class provided by the AJAX Framework to work with the DOM components in a webpage. And you can say, Sys is the root namespace or mother-of-all classes, just like System is the root namespace in C#.

After a slight Binging, I’s able to get a lot more properties of the Sys.UI.DomEvent class. Please note, they are cross-browser objects. Here is the list:

Properties	Descriptions
rawEvent	event-data object built by the current browser
shiftKey	Returns TRUE, if SHIFT key was pressed
ctrlKey	Returns TRUE, if CTRL key was pressed
altKey	Returns TRUE, if ALT key was pressed
button	captures the mouse-button click and has values as (leftButton, middleButton and rightButton)
charCode	character code for the typed characters
clientX	returns the  x-coordinate of the mouse location relative to client area of the page
clientY	returns the  y-coordinate of the mouse location relative to  client area of the page
target	represents the Element that raised the event
screenX	x-coordinate of mouse-pointer relative to screen
screenY	y-coordinate of mouse-pointer relative to screen
type	Returns name/type of the event (click/mouse)
preventDefault()	Prevents the default action associated with that event
stopPropagation()	Prevents the event from propagation to  the element’s parent nodes

Hope this is handy.
Thanks.