2009-02-10 Marek Habersack <mhabersack@novell.com>

2009-02-10  Marek Habersack  <mhabersack@novell.com>

	* ImageButton.cs: AddAttributesToRender renders the onclick
	attribute only if any of the following is true:
	  - OnClientClick is not empty
	  - Validation is enabled for the control
	  - PostBackUrl is used
	PostBackOptions now indicate that control requires the javascript
	protocol for the handler.
	RaisePostBackEvent passes String.Empty as the argument.
	Fixes bug #463939

2009-02-10  Marek Habersack  <mhabersack@novell.com>

	* ImageButtonTest.cs: added test for bug #46393

svn path=/trunk/mcs/; revision=126482