13.3 nan属性.html

来自「javascript即用即差核心对象手册」· HTML 代码 · 共 6 行

<script>
  var oNum=new Number(2);
  oNum=Number.NaN;
  document.write("Number.NaN=Number.NaN:"+(oNum==oNum));
  document.write("<br>isNaN(Number.NaN):"+isNaN(oNum));
</script>