var addCookie=function(objName,objValue,objHours){//添加cookie
            var str = objName + "=" + escape(objValue);
            if(objHours > 0){//为0时不设定过期时间，浏览器关闭时cookie自动消失
                var date = new Date();
                var ms = objHours*3600*1000;
                date.setTime(date.getTime() + ms);
                str += "; expires=" + date.toGMTString();
            }
            document.cookie = str;
        };        
        var getCookie=function(objName){//获取指定名称的cookie的值
            var arrStr = document.cookie.split("; ");
            for(var i = 0;i < arrStr.length;i ++){
                var temp = arrStr[i].split("=");
                if(temp[0] == objName){                
                return unescape(temp[1]);
                }
            } 
        };        
        var add=function(cookie_name,cookie_value,cookie_expireHours){//添加Cookie
            addCookie(cookie_name,cookie_value,cookie_expireHours);
        }; 


function getObject(elementId) { //获取指定id的object
 if (document.getElementById) {
  return document.getElementById(elementId);
 } else if (document.all) {
  return document.all[elementId];
 } else if (document.layers) {
  return document.layers[elementId];
 }
}
function changeStyle(id){//切换样式
 var stylesheet=getObject("skin").href="/css/skin"+id+".css";
 var task=getObject("task").src="/images/skin"+id+"/live.gif";
 var skin="skin"+id;
add("stylesheet",stylesheet,720);
add("skin",skin,720);
if (window.XMLHttpRequest){
} else {
window.location.reload();
} 

}


function initStyle(){ //初始化样式，如果cookie存在样式，则加载cookie样式，否则加载默认样式
   getObject("skin").href=getCookie("stylesheet");
}
if(/stylesheet=([^;]+)/.test(document.cookie))//判断是否存在cookie.
initStyle();