1、在数组的开头添加新元素 - unshift()

<script>

function

myFunction()

{

var

fruits = [

"Banana"

,

"Orange"

,

"Apple"

,

"Mango"

];

fruits.unshift(

"Lemon"

,

"Pineapple"

);

var

x=document.getElementById(

"demo"

);

x.innerHTML=fruits;

}

</script>

 

测试结果:

Lemon,Pineapple,Banana,Orange,Apple,Mango

2、在数组的第2位置添加一个元素 - splice()

<script>

function

myFunction()

{

var

fruits = [

"Banana"

,

"Orange"

,

"Apple"

,

"Mango"

];

fruits.splice(2,0,

"Lemon"

,

"Kiwi"

);

var

x=document.getElementById(

"demo"

);

x.innerHTML=fruits;

}

</script>

测试结果:

Banana,Orange,Lemon,Kiwi,Apple,Mango

3、数组的末尾添加新的元素 - push()

<script>

var

fruits = [

"Banana"

,

"Orange"

,

"Apple"

,

"Mango"

];

​

function

myFunction()

{

fruits.push(

"Kiwi"

)

var

x=document.getElementById(

"demo"

);

x.innerHTML=fruits;

}

</script>

测试结果:

Banana,Orange,Apple,Mango,Kiwi

以上文档参考来源：

http://www.jb51.net/article/73867.htm

实际应用：

var head_data = opt.head;//注意，如果有多层嵌套时要分别获取元素的根

var head_icon = head_data.icon;

head_icon.splice(3,0,{

icon: 'fi fi-clothes',

title: '主题',

onclick: function(){

layer.open({

type: 2,

title: '切换皮肤',

shadeClose: false,

shade: 0,

area: ['380px', '40%'],

content: 'url' //iframe的url

});

}

});