1. 關(guān)于函數(shù)
函數(shù)是一組執(zhí)行任務(wù)的javaScript語(yǔ)句.
head節(jié)點(diǎn)內(nèi)添加js代碼
<head>
<meta charset="utf-8">
<title> mytest </title>
<script>
//將函數(shù)首地址賦值給window.onload ,當(dāng) web界面加載完成后會(huì)調(diào)用unload 方法,然后調(diào)用say something方法
window.onload = saySomething;
function saySomething(){
// 獲取元素值
document.getElementById("helloMessage").innerHTML = "hello world !";
}
</script>
</head>
baby節(jié)點(diǎn)內(nèi)添加代碼
<body>
<h1 id="helloMessage"> test </h1>
</body>
用opera瀏覽器打開效果如下
document.getElementById("helloMessage").innerHTML = "hello world !";
document 通過(guò)ID獲取節(jié)點(diǎn)h1 并將其內(nèi)容更改為helloworld !
對(duì)js剛興趣的童鞋可以試一下~~
