//cookie操作3个方法

//设置cookie

function setCookie(name, value) {

var argv = setCookie.arguments;

var argc = setCookie.arguments.length;

var expires = (argc > 2) ? argv[2] : null;

if (expires != null) {

var LargeExpDate = new Date();

LargeExpDate.setTime(LargeExpDate.getTime() + (expires * 1000 * 3600 * 24));

}

document.cookie = name + "=" + escape(value) + ((expires == null) ? "" : ("; expires=" + LargeExpDate.toGMTString()));

}

//获取cookie

function getCookie(Name) {

var search = Name + "="

if (document.cookie.length > 0) {

offset = document.cookie.indexOf(search)

if (offset != -1) {

offset += search.length

end = document.cookie.indexOf(";", offset)

if (end == -1) end = document.cookie.length

return unescape(document.cookie.substring(offset, end))

}

else return ""

}

}

//删除cookie

function deleteCookie(name) {

var expdate = new Date();

expdate.setTime(expdate.getTime() - (86400 * 1000 * 1));

setCookie(name, "", expdate);

}