elems-byname.js

来自「这是《JavaScript学习源代码》一书的源代码」· JavaScript 代码 · 共 9 行

function show_attribs()
{
  // check for W3C DOM
  if( !window.document.getElementById ) { alert("Not W3C DOM browser!"); return; }

 var pics = window.document.getElementsByTagName("img");

 alert(pics[0].alt + "\n" + pics[1].alt);
}