<script type="text/javascript" src="/sites/sprc/Resources%20%20jQuery/jquery-1.3.2.min.js"></script>
<script type="text/javascript" src="/sites/sprc/Resources%20%20jQuery/jQuery%20SP%20Services/jquery.SPServices-0.5.4.min.js"></script>
<script type="text/javascript">

function StartWorkflow(ItemURL, ItemID) {
  var loadingImage = ‘Loader’ + ItemID;
  var workflowDiv = ‘WorkflowDiv’ + ItemID;
  //Show our loading image
  document.getElementById(loadingImage).style.visibility = ‘visible’;
  $().SPServices({
    operation: "StartWorkflow",
    item: ItemURL,
    templateId: "{04ee1c93-f6b7-49b3-a79c-fa3142ecd688}",
    workflowParameters: "<root />",
    completefunc: function() {
      document.getElementById(workflowDiv).innerHTML = ‘Workflow Started’;
    }
  });
}
</script>

function startWorkflow(itemID, subID) {
    var context = SP.ClientContext.get_current();
    var web = context.get_web();
    var wfServiceManager = SP.WorkflowServices.WorkflowServicesManager.newObject(context, web);
    var subscription = wfServiceManager.getWorkflowSubscriptionService().getSubscription(subID);

    context.load(subscription);
    context.executeQueryAsync(
        function(sender, args){
            console.log("Subscription load success. Attempting to start workflow.");
            var inputParameters = {};
            wfServiceManager.getWorkflowInstanceService().startWorkflowOnListItem(subscription, itemID, inputParameters);

            context.executeQueryAsync(
                function(sender, args){ console.log("Successfully starting workflow."); },
                function(sender, args){
                    console.log("Failed to start workflow.");
                    console.log("Error: " + args.get_message() + "n" + args.get_stackTrace());
                }
            );
        },
        function(sender,args){
            console.log("Failed to load subscription.");
            console.log("Error: " + args.get_message() + "n" + args.get_stackTrace());
        }
    );
}