to sum up
Table layout drawback is the mark than other html accounted for more bytes, will block the rendering order browser rendering engine, will affect the entry into force of some of its internal layout attributes, advantages is to do with the form table is entirely correct
The disadvantage of Tables
1, other html tags representing more bytes than the Table. (Delay download times, tying up server resources more traffic.)
2, Tablle will block the rendering order browser rendering engine. (Delay the generation speed of the page, allowing users to wait even longer.)
3, the Table where you need to put a single, logical diagram of the image into a plurality of display images. (Increase in design complexity, increase page load times, increasing the number of HTTP sessions.)
4, in some browsers Table in the copy of the text will be problems. (They make people unhappy.)
5, the Table will affect the entry into force of some of its internal layout properties (such as <td> elements in height: 100%) (. This will limit your page design freedom)
6 Once the science knowledge of CSS, you'll find that table do page layouts become more troublesome. (Take the time to learn some knowledge of CSS, it will save you a lot of time later.)
7, on the Table for page layout, it is semantically incorrect. (Which describes the performance, not the content.)
8, the Table will make the code reader crazy. (Not only can not use CSS, but you will unintelligible)
9, the Table Once the design is completed becomes dead, it is difficult to show a new look by CSS.
Tables of advantage
in some cases, using the Table for 100%, and properly correct. For example, make a table with table is entirely correct.