<!--
/* 设置cookies 
*  param name 变量名
*  param value 值
*  param hours 保留几个小时
*/
function setCookie(name, value, hours){
  var expire = "";
  if(hours != null)  {
    expire = new Date((new Date()).getTime() + hours * 3600000);
    expire = "; path=/ ; expires=" + expire.toGMTString();
  }
  document.cookie = name + "=" + escape(value) + expire;
}

function getCookie(name){
  var cookieValue = "";
  var search = name + "=";
  if(document.cookie.length > 0)  { 
    offset = document.cookie.indexOf(search);
    if (offset != -1)    { 
      offset += search.length;
      end = document.cookie.indexOf(";", offset);
      if (end == -1) end = document.cookie.length;
      cookieValue = unescape(document.cookie.substring(offset, end))
    }
  }
  return cookieValue;
}

function DelCookie(name)
{
  var exp = new Date();
  exp.setTime(exp.getTime() - 1);
  var cval=getCookie(name);
  if(cval!=null) document.cookie=name +"="+cval+";expires="+exp.toGMTString();
}

-->