This might be simple, but I can't figure it out: How can I write a self-contained widget that handles its own callback from a dojo.io.bind() call? Specifically, how can I bind the callbacks (load, error) from a dojo.io.bind call to an object's method?

You could use:

 	
this.clicked = function() {
	dojo.io.bind({
		url: this.actionURL,
		method: 'get',
		content: {
			id: this.rowId,
			field: this.dbField,
			value: this.checked
		},
		load: dojo.lang.hitch(this, this.clickSuccess)
	});
}