<script>
function setCookie( key, val, expire){
var dateTime = new Date();
dateTime.setTime( dateTime.getTime() + (expire)*24*3600*1000);
document.cookie = key + "="+ val + "; expires=" + dateTime.toGMTString();
}
function delCookie(key){
setCookie(key, "", -1 );
}
function getCookie( name ){
var cookies = document.cookie;
var cookieArr = cookies.split("; ");
for( var i = 0; i < cookieArr.length; i++ ){
var cookie = cookieArr[i].split("=");
if( cookie[0] == name ){
return cookie[1];
}
}
}
function set(){
setCookie("aaa","landen",10);
}
function del(){
delCookie("aaa");
}
function get(){
alert(getCookie( "aaa"))
}
</script>
<body>
<input type="button" id="setBtn" onclick="set()" value="设置">
<input type="button" id="delBtn" onclick="del()" value="删除">
<input type="button" id="getBtn" onclick="get()" value="获取">
</body>