JavaScript基本入門文法集合第1/3頁

建立指令碼塊
<script language=”JavaScript”>
JavaScript code goes here
</script>
隱藏指令碼代碼

<script language=”JavaScript”>
<!--
document.write(“Hello”);
// -->
</script>

瀏覽器不支援的時候顯示

<noscript>
Hello to the non-JavaScript browser.
</noscript>

連結外部指令檔

<script language=”JavaScript” src="/”youname.js"”></script>

注釋指令碼

// This is a comment
document.write(“Hello”); // This is a comment
/*
All of this
is a comment
*/

輸出到瀏覽器

document.write(“<strong>輸出內容</strong>”);

定義變數

var myVariable = “some value”;

字串相加

var myString = “String1” + “String2”;

字串搜尋

<script language=”JavaScript”>
<!--
var myVariable = “Hello there”;
var therePlace = myVariable.search(“there”);
document.write(therePlace);
// -->
</script>

字串替換

thisVar.replace(“Monday”,”Friday”);