var colors = ["red", "green", "blue"]; var removed = colors.splice(0,1);          // 刪除第一項

alert(colors); // green,blue

alert(removed); // red，返回的陣列中只包含一項

removed = colors.splice(1, 0, "yellow", "orange");        // 從位置 1 開始插入兩項

alert(colors); // green,yellow,orange,blue

alert(removed); // 返回的是一個空陣列

removed = colors.splice(1, 1, "red", "purple");         // 插入兩項，刪除一項

alert(colors); // green,red,purple,orange,blue

alert(removed); // yellow，返回的陣列中只包含一項