forTash.js

function init () {
    // find widgets by id:
    var myStandby = dijit.byId('basicStandby1'),
        myForm = dijit.byId('myForm');
    // i don't think you need this line, but i haven't studied the BasicStandby widget
    //document.body.appendChild(myStandby.domNode);
    dojo.connect(myForm, 'onSubmit', function() {
        myStandby.show();
    });
}

dojo.addOnLoad(init);