var colors=["red","blue"]; var index=1; //insert "white" at index 1 colors.splice(index, 0, "white"); //colors = ["red", "white", "blue"]
var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());