var zip2address = (function(callback){
  this.proxy     = 'http://zip.ricollab.jp/';
  this.callback  = callback || 'jsonp';
  this.parse = function(zip){
    var script = document.createElement('script'); 
    script.id = this.proxy + '/' + zip + '.json?callback=' + this.callback;
    script.charset = 'UTF-8';
    script.src = script.id; 
    document.lastChild.appendChild(script);
  };
  return this;
})();

function jsonp(json){
    var addr = json.address;
    //document.getElementById('pref').value = addr.prefecture;
    //document.getElementById('add1').value = addr.city;
    document.getElementById('add1').value = addr.prefecture+addr.city+addr.town;
};