carBtn.onclick = function(){
//改變按鈕的class
listBtn.className = "btn-list-off";
carBtn.className = "btn-car-on";
//改變每一個圖片的路徑以及它的對應的父節點的class的值
for(var i=0;i<imgs.length;i++)
{
imgs[i].src = "./images/big.jpg";
imgs[i].parentNode.className = "a-img";
}
}
}
</script>
