Javascript | 
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/**
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 * 设置cookies
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 */
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function setCookie(c_name,value,expiredays)
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{
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    var exdate=new Date()
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    exdate.setDate(exdate.getDate()+expiredays)
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    document.cookie=c_name+ "=" +escape(value)+
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    ((expiredays==null) ? "" : ";expires="+exdate.toGMTString())
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}
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/**
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 * 获取cookies
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 */
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function getCookie(c_name)
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{
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    if (document.cookie.length>0)
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    {
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        c_start=document.cookie.indexOf(c_name + "=")
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        if (c_start!=-1)
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        {
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            c_start=c_start + c_name.length+1
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            c_end=document.cookie.indexOf(";",c_start)
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            if (c_end==-1) c_end=document.cookie.length
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            return unescape(document.cookie.substring(c_start,c_end))
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        }
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    }
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    return "";
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}

cookies, js, 设置, 读取