灭灯小游戏

var index = this.index;
		// alert(index);  弹出第几格
		this.className = (this.className == "dakai") ? "":"dakai";
		if((index / num) >= 1){ //上
			di[index - num].className = (di[index - num].className == "dakai") ? "":"dakai"; 
		}
		if((index / num) < (num -1)){ //下
			di[index + num].className = (di[index + num].className == "dakai") ? "":"dakai";
		}
		if((index % num) != 0){ //左
			di[index -1].className = (di[index -1].className == "dakai") ? "":"dakai";
		}
		if((index % num) != (num-1)){ //右
			di[index +1].className = (di[index +1].className == "dakai") ? "":"dakai";
		}
		for(var i = 0; i< num*num; i++ ){
			if(di[i].className != ""){
				return;
			}
		}