cookie习题

cookie练习
function getCookie(c_name)
{
var i,x,y,ARRcookies=document.cookie.split(";");
for (i=0;i<ARRcookies.length;i++)
  {
  x=ARRcookies[i].substr(0,ARRcookies[i].indexOf("="));
  y=ARRcookies[i].substr(ARRcookies[i].indexOf("=")+1);
  x=x.replace(/^\s+|\s+$/g,"");
  if (x==c_name)
    {
    return unescape(y);
    }
  }
}


function setCookie(c_name,value,exdays)
{
var exdate=new Date();
exdate.setDate(exdate.getDate() + exdays);
var c_value=escape(value) + ((exdays==null) ? "" : "; expires="+exdate.toUTCString());
document.cookie=c_name + "=" + c_value;
}

//设置查询间隔与日期区间 zhangsl 20120307

$(function() {
var username=getCookie("username00");
//以后让查询有间隔
if (username!=null && username!="")
  {
  var queryFrequency='${queryFrequency}';
  document.getElementById('query').disabled = true;
  setTimeout("document.getElementById('query').disabled=false",queryFrequency);
  }
  //第一次查询，什么都不做。
else
  {
    setCookie("username00",username,365);
  }
});