//写cookies函数
//两个参数，一个是cookie的名子，一个是值
function setCookie(name,value)
{
    var Days = 365; //此 cookie 将被保存 100 天
    var exp  = new Date();    
    exp.setTime(exp.getTime() + Days*24*60*60*1000);
   document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
  //  document.cookie = name + "="+ escape (value)+ ";expires=-1"  ;
}

//取cookies函数   
function getCookie(name)     
{
    var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
     if(arr != null)
      return unescape(arr[2]); 
     return null;

}
//删除cookie
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();
}

//存文件ID至Cookie内
function addID(id) 
{
    var name="upLoadFileCookieA";
    var exp  = new Date();  //获得当前时间
    exp.setTime(exp.getTime()+1000*60*60);  //换成毫秒
    document.cookie = name + "="+ escape (id) + ";expires=" + exp.toGMTString(); 
    //alert(name+"="+escape(id)+";expires=" + exp.toGMTString());   
}
function delID(id) 
{  
    var name="upLoadFileCookieA";
    var exp=new Date();  //获得当前时间
    exp.setTime(exp.getTime()+1000*60*60);     //换成毫秒
    document.cookie= name+"="+escape(id)+";expires=" + exp.toGMTString(); 
    
     
}

function setCookie_path(name,value)
{
var Days = 30;
var exp = new Date(); 
exp.setTime(exp.getTime() + Days*24*60*60*1000);
document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString()+";path=/";
}