JavaScript通过元素索引号删除数组中对应元素的方法

function RemoveValByIndex(arr, index) {  arr.splice(index, 1);}test = new Array();test[0] = 'Apple';test[1] = 'Ball';test[2] = 'Cat';test[3] = 'Dog';alert("Array before removing elements: "+test);RemoveValByIndex(test, 2);alert("Array after removing elements: "+test);