Dynamic object generation

utilities.js

function $id(id) {
  return document.getElementById(id)
} 

function $create(kind) {
  return document.createElement(kind)
}

function $move(node, x, y) {
  node.style.left = x.toString() + 'px'
  node.style.top  = y.toString() + 'px'
}


/** uses $create to create a new document node of kind kind, and appends it to 
the parent. */
function $spawn(parent, kind) {
  var child = $create(kind)
  parent.appendChild(child)
  return child
}