JavaScript substring() 方法详解与使用示例

语法与参数说明

string.substring(indexA, [indexB])

<html>
<head>
<title>JavaScript String substring() Method</title>
</head>
<body>
<script type="text/javascript">

var str = "Apples are round, and apples are juicy.";

document.write("(1,2): "  + str.substring(1,2));
document.write("<br />(0,10): "  + str.substring(0, 10));
document.write("<br />(5): "   + str.substring(5));
</script>
</body>
</html>

(1,2): p
(0,10): Apples are
(5): s are round, and apples are juicy.