javascript中设置cookie

/**

* 设置cookie

* @param {string} name 键名

* @param {string} value 键值

* @param {integer} days cookie存储时间

*/

function setCookie(name,value,days) {

if (days) {

var date = new Date();

date.setTime(date.getTime()+(days*24*60*60*1000));

var expires = "; expires="+date.toGMTString();

}else{

var expires = "";

}

document.cookie = name+"="+value+expires+"; path=/";

}

// 获取cookie

function getCookie(name) {

var nameEQ = name + "=";

var ca = document.cookie.split(';');

for(var i=0;i < ca.length;i++) {

var c = ca[i];

while (c.charAt(0)==' ') c = c.substring(1,c.length);

if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);

}

return null;

}

// 删除cookie

function deleteCookie(name) {

setCookie(name,"",-1);

}

// 设置cookie的值

setCookie('username', 'zenghu');

// 取出cookie的值

var data = getCookie('username');

alert(data);

// 删除cookie的值

deleteCookie('username');