function process() {
  var url = "http://maps.yahoo.com/traffic.rss?csz=" + escape(getVal("csz")) + "&mag=" + getVal("mag") + "&minsev=" + getVal("minsev");
  get("url").innerHTML = url;
  get("url").href = url;
}
function get(n) {return document.getElementById(n);}
function getVal(n) {return get(n).value;}