html - margin: 0px auto VS margin: -50% -


i'm write templates new little project - , wondered 1 thing:

if want whole page content inside centered column, - lets - 800px width, usual way of doing (at least, way did it):

<html>     <head>         <style>             body {                 text-align: center; /* ie6 */             }              #wrapper {                 margin: 0px auto;                 width: 800px;                 background-color: #eee; /* see better */                 text-align: left; /* ie6 */             }         </style>     </head>     <body>         <div id="wrapper">             ... content ...         </div>     </body> </html>

now, there method same thing, margin: -50%; (or fixed value, in case margin: 400px;), this:

<html>     <head>         <style>             body {                 margin-left: 50%;             }              #wrapper {                 margin-left: -400px;                 width: 800px;                 background-color: #eee; /* see better */             }         </style>     </head>     <body>         <div id="wrapper">             ... content ...         </div>     </body> </html>

my question - 1 of 2 methods have advantages on other? or disadvantages? there common 'best solution' centering main column?

margin:0 auto; make sure there equal amounts of space on either side of element.

margin-left:50%; relative parent. example, if container 1000px wide, have left margin of 500px on child element. however, not center element, place it's left side in middle — unless hack fixed value on child element in example.

usually, when dealing wrapper in case, margin:0 auto; simplest , flexible solution. in other cases, might find better use percentage or fixed value (for example, when floating stuff).


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