通过页面按钮更换网页风格CSS的JS代码

<style type="text/css">
.themes{border:1px solid #000;}
</style>
<script language="javascript" type="text/javascript">
<!--
var arrCSS=[
    ["<img src='http://www.zzsc.org/texiao/zzsc_demo/huanskin/images/ocean.gif' width='16' height='8' class='themes' alt='Ocean'>","http://www.zzsc.org/texiao/zzsc_demo/huanskin/css/ocean.css"],
    ["<img src='http://www.zzsc.org/texiao/zzsc_demo/huanskin/images/tangerine.gif' width='16' height='8' class='themes' alt='Tangerine'>","http://www.zzsc.org/texiao/zzsc_demo/huanskin/css/tangerine.css"],
    ["<img src='http://www.zzsc.org/texiao/zzsc_demo/huanskin/images/violet.gif' width='16' height='8' class='themes' alt='Violet'>","http://www.zzsc.org/texiao/zzsc_demo/huanskin/css/violet.css"],
    ["<img src='http://www.zzsc.org/texiao/zzsc_demo/huanskin/images/oyster.gif' width='16' height='8' class='themes' alt='Oyster'>","http://www.zzsc.org/texiao/zzsc_demo/huanskin/css/oyster.css"],
    ["<img src='http://www.zzsc.org/texiao/zzsc_demo/huanskin/images/grass.gif' width='16' height='8' class='themes' alt='Grass'>","http://www.zzsc.org/texiao/zzsc_demo/huanskin/css/grass.css"],
    ""
 ];

// *** function to replace href="#" ***
function v(){
 return;
}

// *** Cookies ***
function writeCookie(name, value) { 
 exp = new Date(); 
 exp.setTime(exp.getTime() + (86400 * 1000 * 30));
 document.cookie = name + "=" + escape(value) + "; expires=" + exp.toGMTString() + "; path=/"; 
} 
function readCookie(name) { 
 var search; 
 search = name + "="; 
 offset = document.cookie.indexOf(search); 
 if (offset != -1) { 
  offset += search.length; 
  end = document.cookie.indexOf(";", offset); 
  if (end == -1){
   end = document.cookie.length;
  }
  return unescape(document.cookie.substring(offset, end)); 
 }else{
  return "";
 }
}

////////////////////////////////////
// StyleSheet
////////////////////////////////////
function writeCSS(){
  for(var i=0;i<arrCSS.length;i++){
    document.write('<link title="css'+i+'" href="'+arrCSS[i][1]+'" rel="stylesheet" disabled="true" type="text/css" />');
  }
    setStyleSheet(readCookie("stylesheet"));
}

function writeCSSLinks(){
  for(var i=0;i<arrCSS.length-1;i++){
    if(i>0) document.write('  ');
    document.write('<a href="javascript:v()" onclick="setStyleSheet(\'css'+i+'\')">'+arrCSS[i][0]+'</a>');
  }
}

function setStyleSheet(strCSS){
  var objs=document.getElementsByTagName("link");
  var intFound=0;
  for(var i=0;i<objs.length;i++){
    if(objs[i].type.indexOf("css")>-1&&objs[i].title){
      objs[i].disabled = true;
      if(objs[i].title==strCSS) intFound=i;
    }
  }
  objs[intFound].disabled = false;
  writeCookie("stylesheet",objs[intFound].title);
}

writeCSS();
setStyleSheet(readCookie("stylesheet"));

// 隐藏显示换肤框
function ShowHideDiv(init) {
 if(document.getElementById("Sright").style.display == "block"){
   document.getElementById("Sright").style.display = "none";
  }
  else{
   document.getElementById("Sright").style.display = "block";
  }
}
//-->
</script>

<div class="topNav"></div>
<div class="blank4"></div>
<div class="skin">
     <div id="page_options" onclick="ShowHideDiv()">
     皮肤设置选项
     <div id="Sright">
          颜色：<script type="text/javascript">writeCSSLinks();</script>
     </div>
  </div>
</div>
<div class="blank4"></div>
<div class="newsbody">
     <div class="coleft">
          <div class="clear"></div>
     </div>
     <div class="cocenter">
       <div class="cconter"></div>    
     <div class="clear"></div>
     </div>
     <div class="coright">
          <div class="clear"></div>
     </div>
<div class="clear"></div>     
</div>
<div class="blank4"></div>
<div class="footer"></div>