面向?qū)ο蠛皖?/h1>

for (var i = 0; i<num ; i++) {

var obj = new starObj();

stars.push(obj);

stars[i].init();

}

這段代碼中的var obj = new starObj();是什么意思？是new 一個對象是嗎？

請問他和下面這段代碼是什么關(guān)系呀？

var starObj = function () {

this.x;

this.y;

}

starObj.prototype.init = function () {

this.x = Math.random()*600 +100;

this.y = Math.random()*300 + 150;

}

starObj.prototype.draw = function () {

cxt.drawImage(starPic,this.x,this.y)

}

function drawStars () {

for (var i = 0; i<num;i++){

stars[i].draw();

}

}