判断客户浏览器是否支持cookie

function check(){
if(window.navigator.cookieEnabled)
       return true;
else{
       alert("浏览器配置错误，Cookie不可用！");
       return false;}
}  

SetCookie('cookie_test','');
var cookie_test = getCookie('cookie_test');
if( '' != cookie_test)
{
 alert('不支持');
}else
{
 alert('支持');
}  

function SetCookie(name,value)//两个参数，一个是cookie的名子，一个是值
{
   var Days = ; //此 cookie 将被保存 30 天
   var exp = new Date(); //new Date("December 31, 9998");
   exp.setTime(exp.getTime() + Days****);
   document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
}
function getCookie(name)//取cookies函数
{
   var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
   if(arr != null) return unescape(arr[]); return null;  

}
function delCookie(name)//删除cookie
{
   var exp = new Date();
   exp.setTime(exp.getTime() - );
   var cval=getCookie(name);
   if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();
}  

var cookieEnabled=(navigator.cookieEnabled)? true : false
//判断cookie是否开启  

//如果浏览器不是ie4+或ns6+
if (typeof navigator.cookieEnabled=="undefined" && !cookieEnabled){
document.cookie="testcookie"
cookieEnabled=(document.cookie=="testcookie")? true : false
document.cookie="" //erase dummy value
}