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我正在练习一些JavaScript,我想弄清楚如何将屏幕左侧的div移动到右侧。我在一个单独的文件中做了这个测试,并首先测试它,但是,如果我创建一个类并将其中的函数和变量停止工作,并且Firebug不会返回任何错误。谁能帮我? 这里是我想出代码:写入类后不工作
function crear_div(){
this.pos_x = 10;
this.pos_y = 10;
this.x_min = 10;
this.x_max = 500;
this.y_min = 10;
this.y_max = 500;
this.incremento = 10;
this.estado = 0;
this.id_elemento = "pelota";
this.f0 = f0;
this.f2 = f2;
}
function f0(){
this.pos_x = this.pos_x + this.incremento;
document.getElementById(this.id_elemento).style.left = this.pos_x + "px";
if (this.pos_x >= this.x_max){
this.estado = 1;
}
}
function f2(){
this.pos_x = this.pos_x - this.incremento;
document.getElementById(id_elemento).style.left = this.pos_x + "px";
if (this.pos_x <= this.x_min){
this.estado = 0;
}
}
function desplazar(){
switch(this.estado){
case 0:
this.f0();
break;
case 1:
this.f2();
break;
}
}
window.setInterval(function() {this.desplazar();}, 250);
'this'没有在'setInterval的设置'功能。 – Barmar 2015-03-31 02:38:53
你永远不会调用'crear_div'。 – Barmar 2015-03-31 02:39:37