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HomeWeb Front-endHTML TutorialHTML+CSS学习笔记(4)

1、使用标签,链接到另一个页面

使用标签可实现超链接,它在网页制作中可以说是无处不在,只要有链接的地方,就会有这个标签。

语法:

<a  href="目标网址"  title="鼠标滑过显示的文本">链接显示的文本</a>

例如:

<a  href="http://www.baidu.com"  title="点击进入百度">click here!</a>

上面例子作用是单击click here!文字,网页链接到http://www.baidu.com这个网页。

title属性的作用,鼠标滑过链接文字时会显示这个属性的文本内容。这个属性在实际网页开发中作用很大,主要方便搜索引擎了解链接地址的内容(语义化更友好),如右侧案例代码(8-12行)。

注意:只要为文本加入a标签后,文字的颜色就会自动变为蓝色(被点击过的文本颜色为紫色)。

2、在新建浏览器窗口中打开链接

标签在默认情况下,链接的网页是在当前浏览器窗口中打开,有时我们需要在新的浏览器窗口中打开。

如下代码:

<a href="目标网址" target="_blank">click here!</a>

3、使用mailto在网页中链接Email地址

标签还有一个作用是可以链接Email地址,使用mailto能让访问者便捷向网站管理者发送电子邮件。我们还可以利用mailto做许多其它事情。注意:如果mailto后面同时有多个参数的话,第一个参数必须以“?”开头,后面的参数每一个都以“&”分隔。

下面是一个完整的实例:

<a href="mailto:shuai@163.com?cc=shuaishuai@163.com&bcc=xiaoshuai@163.com">

4、认识HTML+CSS学习笔记(4)标签,为网页插入图片

在网页的制作中为使网页炫丽美观,肯定是缺少不了图片,可以使用HTML+CSS学习笔记(4)标签来插入图片。

语法:

<img src="/static/imghwm/default1.png"  data-src="图片地址"  class="lazy" alt="下载失败时的替换文本" title = "提示文本">

举例:

<img src = "myimage.gif" alt = "My Image" title = "My Image" />

讲解:

1、src:标识图像的位置;

2、alt:指定图像的描述性文本,当图像不可见时(下载不成功时),可看到该属性指定的文本;

3、title:提供在图像可见时对图像的描述(鼠标滑过图片时显示的文本);

4、图像可以是GIF,PNG,JPEG格式的图像文件。


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