function aaa(){
var aa=layer.load(1,{shade:[0.4,'gray']});
var now = new Date();
var exittime = now.getTime()+2000;
while(true){
now = new Date();
if(now.getTime() > exittime){
break;
}
}
layer.close(aa);
}
调用该方法,遮罩会在两秒后出现然后马上消失,并不是出现两秒后再关闭?这是为什么?如何解决?