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CSS centering

1 ) CSS horizontal and vertical centering - 1

Centering a container with the whole content of a web page inside in the viewable area of a web browser by means of CSS. A box to contain the whole content of the page is CSS centered horizontally and vertically. More for modern web browsers : [ More ] : [ Open demo page ]

2 ) CSS horizontal and vertical centering - 2

Centering a container with the whole content of a web page inside in the viewable area of a web browser by means of CSS. A box to contain the whole content of the page is CSS centered horizontally and vertically. More conservative, than the previous method. Suitable not only for modern web browsers, but for older ones as well - like Internet Explorer 6 or earlier Maxthon. A shortcoming - it takes more efforts to maintain the CSS code compared to [ CSS horizontal and vertical centering - 1 ] method : [ More ] : [ Open demo page ]

3 ) CSS centering floated elements

Floated elements of unknown width are CSS centered horizontally : [ More ] : [ Open demo page ]

4 ) CSS centering absolutely positioned elements

CSS horizontal centering of an absolutely positioned element : [ More ]

5 ) CSS centering image

CSS horizontal centering of an image : [ More ]

6 ) CSS vertical alignment

CSS vertical alignment of a block element containing text and images. The method works for various combinations of inline and block elements : [ More ]

7 ) JavaScript + CSS centering

Centering content of a web page by means of JavaScript and CSS. A block containing the content of a page is JavaScript + CSS centered horizontally and vertically : [ More ] : Two cases :

1. A block is centered, if screen resolution is equal to or greater than 1024x768 : [ Open demo page ]

2. A block is centered, if screen resolution is equal to or greater than 1024x768 + mouse cursor is moved over a link in an element of the page content : [ Open demo page ]


Aliosque subditos et thema

 

CSS. Target Opera only

 

CSS targeting Opera web browser only: This text is red in Opera HTML / XHTML. Code: <p>This text is red in Opera</p> CSS. Code: doesnotexist:-o-prefocus, p {color: #f00;} The -o-prefocus pseudo-class allows styling elements for Opera browser only. The code is placed in the common CSS file, not in a separate one as it is in case of Internet Explorer conditional comments. Source: http://www.opera.com/docs/specs/presto2.12/css/o-vendor/ [ 1 ] Opera 3.5 - 5.0 ignores "doesnotexist:-o-prefocus" and reads code as p {color: #f00;}. Opera 6.0 - 9.4 ignores the whole code starting "doesnotexist". [ 2 ] Internet Explorer 5.5+, Firefox 1.0+, Google Chrome, Safari 3.1+, SeaMonkey 1.0+, Netscape 7.2+, Mozilla 1.5+ ignore the whole code starting "doesnotexist". Older browsers like Internet Explorer before 5.5 or Netscape before 7.2 or Mozilla before 1.5 seem to ignore the uncommon, Opera 9.5+ specific code ("doesnotexist:-o-prefocus") and apply styles to what they understand - here it is the p tag; making the text in it red. [ 3 ] The text is red in Dillo 3.0.1 as well.

VBScript rollover. Image swap

 

VBScript rollover, using image swap. Two examples: several ways of applying VBScript in a web page. VBScript rollover Example 1 HTML / XHTML. Code: <a href="#" onmouseover="onMouse_over()" onmouseout="onMouse_out()"><img src="out.gif" id="rollover" alt="" /></a> VBScript. Code (<script> tag including): <script type="text/vbscript"> Sub onMouse_over() rollover.src='over.gif' End Sub Sub onMouse_out() rollover.src='out.gif' End Sub </script> Note: an external VBScript script file may also be used. The code itself is the same (without <script> tag pair, surely). The file is linked to page very much like a JavaScript file would be: <script type="text/vbscript" src="vbscript.vbs"></script> VBScript rollover Example 2 HTML / XHTML. Code: <a href="#"><img src="out.gif" id="rollover2" alt="" /></a> VBScript. Code (<script> tag including): <script type="text/vbscript" event="OnMouseOver" for="rollover2"> rollover.src='over.gif' </script> <script type="text/vbscript" event="OnMouseOut" for="rollover2"> rollover.src='out.gif' </script>