adamc@574: function sc(v) { return {v : v} }
adamc@574: 
adamc@574: function ss(s) { return {v : s.v} }
adamc@572: function sr(v) { return {v : v} }
adamc@572: function sb(x,y) { return {v : y(x.v).v} }
adamc@571: 
adamc@571: function dyn(s) {
adamc@571:   var x = document.createElement("span");
adamc@571:   x.innerHTML = s.v;
adamc@571:   document.body.appendChild(x);
adamc@571: }