XHTML+CSS的静态页面实现多风格选择的方法

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1. styleswitcher.js   
function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  documents.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = documents.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);
 

2、CSS调用：

  CODE:   
<link rel="stylesheet"  type="text/CSS" href="default.CSS"  />  //默认的样式这样调用
<link rel="stylesheet" type="text/CSS" href="../../one.CSS" title="name_one" /> //其他的样式这样调用
<link rel="stylesheet" type="text/CSS" href="../../two.CSS" title="name_two" />
...
 

3、JS调用：

 

  CODE:   
<script type="text/javascript"  src="styleswitcher.js"></script>
 

4、风格选择的实现：
写在页面的body中

 

  CODE:   
<a href="#"
onclick="setActiveStyleSheet('',1);
return false;">默认样式</a>
<a href="#"
onclick="setActiveStyleSheet('name_one',1);
return false;">样式一</a>
<a href="#"
onclick="setActiveStyleSheet('name_two',1);
return false;">样式二</a>

本文作者:

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