jQuery 发送验证码倒计时按钮

{
wait:90,

hsTime:function(that){

if (this.wait == 0) {
$('#hsbtn').removeAttr("disabled").val('重发短信验证码');
this.wait = 90;
} else {
var _this = this;
$(that).attr("disabled", true).val('在'+_this.wait+'秒后点此重发');
_this.wait--;
setTimeout(function() {
_this.hsTime(that);
}, 1000)
}
},
}