js操作cookie

function setCookie(name, value, iDay)
{
var oDate=new Date();

oDate.setDate(oDate.getDate()+iDay);

document.cookie=name+'='+encodeURIComponent(value)+';expires='+oDate;
}

function getCookie(name)
{
var arr=document.cookie.split('; ');
var i=0;
for(i=0;i<arr.length;i++)
{
//arr2->['username', 'abc']
var arr2=arr[i].split('=');

if(arr2[0]==name)
{
var getC = decodeURIComponent(arr2[1]);
return getC;
}
}

return '';
}

function removeCookie(name)
{
setCookie(name, '1', -1);
}