在jsp中设置cokie

//设置Cookiefunction setCookie(cname,cvalue,exdays){  //cname：是key；cvalue：是值；exdays：是时间    var d = new Date();    d.setTime(d.getTime()+(exdays*24*60*60*1000));    var expires = "expires="+d.toGMTString();    document.cookie = cname + "=" + cvalue + "; " + expires;}//获取Cookiefunction getCookie(cname){    var name = cname + "=";    var ca = document.cookie.split(';');    for(var i=0; i<ca.length; i++){        var c = ca[i].trim();        if (c.indexOf(name)==0) return c.substring(name.length,c.length);    }    return "";}//删除Cookiefunction deleteCookie(){    document.cookie = "username=; expires=Thu, 01 Jan 1970 00:00:00 GMT"    document.cookie = "password=; expires=Thu, 01 Jan 1970 00:00:00 GMT"

}