Intermediary transaction http://www.aliyun.com/zixun/aggregation/6858.html ">seo diagnose Taobao guest cloud host technology Hall
May be a lot of beginners in the station to optimize the time, do not understand the picture label IMG ALT and title of the difference, today, SEM college alone for everyone to clean up and share the difference.
You can do the test together: The text that is saved in the following code is named the file with an. html end, and then opened separately in a different browser.
Code：
<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 strict//en"
"Http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd" >
<html xmlns= "http://www.w3.org/1999/xhtml" >
<head><title> picture Label the difference between ALT and title in IMG </title></head>
<body>
<img src= "Correct address of image" title= "title correct picture" >
<img src= "Correct address of image" alt= "alt correct picture" >
<img src= "Image error Address" title= "title error Picture" >
<img src= "Image error Address" alt= "alt error Picture" >
</body>
</html>
The performance of the code under IE6
The performance of the code under IE8
The performance of the code under Firefox
From the above three photos we can see the difference between Alt and title:
1. Different meanings
ALT is the alternative text when the picture doesn't exist; title is the description and further explanation of the picture
2, the performance in the browser is different
In Firefox and IE8, the title value is displayed when the mouse passes through the picture, and the Alt value is not displayed; only in IE6, the title and ALT values are displayed when the mouse passes over the picture.
For website SEO optimization, title and alt have the most important point:
The search engine to the picture meaning judgment, mainly relies on the ALT attribute. So in the picture Alt attribute to brief text description, also contains the keyword, is also the page optimization part. If conditions permit, you can further describe the picture in the title attribute.
Author: Mengfanxing @sem College
Original link: http://www.semxyz.com/seo/780.html
All rights reserved, reproduced please link the form of the author and original source
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