js function code that encapsulates cookie operations

var cookie={
setCookie:function (name, value, iDay) {
var oDate = new Date();
(()+iDay);
= name+'='+value+';expires='+oDate;
},
getCookie:function (name) {
var arr = ('; ');
for (var i = - 1; i >= 0; i--) {
var arr2 = arr[i].split('=');
if(arr2[0]===name){
return arr2[1];
}
}
return '';
},
removeCookie:function (name) {
(name,1,-1);
}
};