How to initialize a JSON-RPC Service:

	//You need the package of course
	dojo.require("dojo.rpc.JsonService");

	// Create a callback function to handle the results generated
	// by a method A second optional parameter to your call back
	// will allow the callback to use the submission Id of the 
	// json-rpc request

        function contentCallBack(result) {
	 	dojo.debug("in contentCallBack");
                var handlerNode = document.getElementById("content");
                handlerNode.innerHTML = result;
        }

	// Create a new object
        var testClass = new dojo.rpc.JsonService("testClass.smd");
	

Push these buttons to execute code in the button.

Results will be returned below under "Returned Content"

This button will perform a simple echo

testClass.myecho("blah").addCallback(contentCallBack);

This Button will simply call the function contentB()

testClass.contentB().addCallback(contentCallBack);

This button will call add() to add two numbers together

testClass.add(5,6).addCallback(contentCallBack);

Debug Log: