JavaScript原生读写Cookie方法详解

<HTML>
</HEAD>
<BODY>
<SCRIPT language="JavaScript">
<!--
function set_it() {
  var the_text="name=yourName&";
  var toexpire= new Date("March 15, 2008");
  var expdate="expires="+toexpire.toGMTString();
  the_text+=expdate;
  var newtext=escape(the_text);
  document.cookie=newtext;
}
function read_it() {
 if (document.cookie) {
  var mycookie=document.cookie;
  var fixed_cookie= unescape(mycookie);
  var thepairs= fixed_cookie.split("&");
  var pair1= thepairs[0];
  var pair2= thepairs[1];
  var namevalue1= pair1.split("=");
  alert("read");
  alert("Welcome, "+namevalue1+"!");
 } else {
  alert("set");
  set_it();
 }
}
read_it();
//-->
</SCRIPT>
</BODY>
</HTML>