javascript toString()将数组转换成字符串
<!DOCTYPE html>
<html>
<head>
<title>将数组转换成字符串</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/javascript">
var arr = new Array(3)
arr[0] = "北京"
arr[1] = "上海"
arr[2] = "广州"
document.write(arr.toString())
</script>
</head>
<body>
</body>
</html>