Javascript读写Cookies

<script type="text/javascript">// 写 cookiefunction setCookie(sName, sValue, iTime){ var date = new Date(); date.setTime(date.getTime()+iTime*1000); document.cookie = escape(sName) + "=" + escape(sValue) + "; expires=" + date.toGMTString();}

// 读 cookiefunction getCookie(sName){ var aCookie = document.cookie.split("; "); for (var i=0; i < aCookie.length; i++) {   var aCrumb = aCookie[i].split("=");   if (escape(sName) == aCrumb[0])     return unescape(aCrumb[1]); } return null;}

// 删 cookiefunction delCookie(sName){ var date = new Date(); document.cookie = sName + "= ; expires=" + date.toGMTString();}

// 测试函数function trace(){ alert(document.cookie);}</script>