js倒计时

window.onload = function(){
        var i = 600;
        var timer = setInterval(function(){
            if(i== -1){
                window.location.href="/test/order/result";
                clearInterval(timer);
            }else{
                document.getElementById("time").innerText = "请在"+i+"秒内支付";
                --i;
            }
        },1000);
    }