doc-parts.js

这是《JavaScript学习源代码》一书的源代码

// function to list document components
function show_parts()
{
 
  var parts="";

  parts += "Anchors: " + document.anchors.length;
  parts += "\n1st anchor name: " + document.anchors[0].name;  

  parts += "\nForms: " + document.forms.length;
  parts +=  "\n1st form id: " + document.forms[0].id;

  parts += "\nImages: " + document.images.length;
  parts += "\n1st image id: " + document.images[0].id;
  parts += "\n2nd image id: " + document.images[1].id;

  parts += "\nLinks: " + document.links.length;
  parts += "\n1st link name: " + document.links[0].name;
  parts += "\n2nd link name: " + document.links[1].name;

  alert(parts);

}