js设置了cookies，关闭IE浏览器，然后就取不到那个cookies

js设置了cookies，关闭IE浏览器，然后就取不到那个cookies.
代码是这样的：function set_Cookie(name,value){
var exp = new Date(); 
exp.setTime (exp.getTime()+3600000000); 
document.cookie = name + "=" + value + "; expires=" + exp.toGMTString(); 

  }

HTML code

//设置cookie
function setCookie(name,value) {
    var Days = 1;
    var exp  = new Date();
    exp.setTime(exp.getTime() + Days*24*60*60*1000);
    document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
}
//获取cookie
function getCookie(name) {
    var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
    if(arr=document.cookie.match(reg)) return unescape(arr[2]);
    else return "";
}
//删除cookie
var removeCookie=function(name) {
  document.cookie = name+"=;expires="+(new Date(0)).toGMTString();
};

我用的cookie函数.

看看COOKIE生存周期的设置就明白了。