<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>01globalObject.html</title>
<script>
document.write("eval('1>2')=" + eval('1>2') + "<br>");//F
document.write("isNaN('123a')=" + isNaN('123a') + "<br>");//T
document.write("isNaN('a123')=" + isNaN('a123') + "<br>");//T
document.write("isNaN('123.33')=" + isNaN('123') + "<br>");//F
document.write("escape('123&chen@iii.org.tw')=" + escape('123&chen@iii.org.tw') + "<br>");
//escape('123&chen@iii.org.tw')=123%26chen@iii.org.tw
//escape已不建議使用,但是還是可以拿來解碼,例如用在中文上
document.write("encodeURI('123&chen@iii.org.tw')=" + encodeURI('123&chen@iii.org.tw') + "<br>");
//encodeURI('123&chen@iii.org.tw')=123&chen@iii.org.tw
document.write("escape('中文')=" + escape('中文') + "<br>");
//escape('中文')=%u4E2D%u6587
document.write("unescape('%u4E2D%u6587')=" + unescape('%u4E2D%u6587') + "<br>");
//unescape('%u4E2D%u6587')=中文
document.write("<hr>")
//練習:
//目標:a1=b*c
var b = 5, c = 6, n = 3;
document.write(eval("a" + n + "=b*c") + "<br>")//30
document.write(a3)//30,已記住變數
//eval可以在()內用字串寫運算
</script>
</head>
<body>
</body>
</html>