box==“checkBox  ‘是否记住用户密码’”；

window.onload=function init()

{

 

 var box = getCookie("box_"+str);

 var username = getCookie("usn_"+str);

 var password = getCookie("pwd_"+str);

 if(box=='yes')

 {

  form1.box.checked=true;

  form1.loginName.value=username;

  form1.password.value=password;

 }

if(form1.box.checked)

  {

   SetCookie("usn_"+str,form1.loginName.value);

   SetCookie("pwd_"+str,form1.password.value);

   SetCookie("box_"+str,"yes");

  }else{

   delCookie("box_"+str);

  }

function SetCookie(name,value)//两个参数，一个是cookie的名子，一个是值

{

    var Days = 300; //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 (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();