Formにデータを入れるためのjs

composer.js

var list = document.getElementsByTagName("input");
var kv = {};
for(var i = 0;i < list.length;i++) {
  var name = list[i].getAttribute("name")
  kv[name] = "";
}

var json = JSON.stringify(kv).replace(/","/g,"\"\n  ,\"").replace(/^\{/,"{\n  ").replace(/\}$/, "\n}");

// データを入れる

var data = JSON.parse(json);

for(var name in data) {
  var val = data[name];
  var elm = document.getElementsByName(name);
  if(elm.length > 0) {
    elm[0].value = val;
  }
}