如何使用JavaScript获取文档信息

var title = document.title;
console.log("文档标题：" + title);

var url = document.URL;
console.log("文档URL：" + url);

var domain = document.domain;
console.log("文档域名：" + domain);

var links = document.links;
console.log("文档链接数量：" + links.length);
for (var i = 0; i < links.length; i++) {
    console.log("链接" + (i + 1) + "：" + links[i].href);
}

var images = document.images;
console.log("文档图像数量：" + images.length);
for (var i = 0; i < images.length; i++) {
    console.log("图像" + (i + 1) + "：" + images[i].src);
}

var forms = document.forms;
console.log("文档表单数量：" + forms.length);
for (var i = 0; i < forms.length; i++) {
    console.log("表单" + (i + 1) + "：" + forms[i].id);
}