function SetCookie(name,value)//两个参数，一个是cookie的名子，一个是值 { var Days = 30; //此 cookie 将被保存 30 天 var exp = new Date(); //new Date("December 31, 9998"); exp.setTime(exp.getTime() + Days*24*60*60*1000); document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString(); } function getCookie(name)//取cookies函数 { var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)")); if(arr != null) return unescape(arr[2]); return null; } function delCookie(name)//删除cookie { var exp = new Date(); exp.setTime(exp.getTime() - 1); var cval=getCookie(name); if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString(); } function display(id){ //window.location.reload(); var traget=document.getElementById(id); if(traget.style.display=="none"){ xs1.style.display="none"; xs2.style.display="none"; xs3.style.display="none"; xs4.style.display="none"; // xs5.style.display="none"; traget.style.display=""; SetCookie ("kai",id) }else{ traget.style.display="none"; } } // //onclick="display('xs1');"