The Global object has properties and methods at the highest level, without a parent object. This means the global properties and functions can be used with all the built-in JavaScript objects.
var xn = 1.8976543348623157E+12088; document.write(xn); // Infinity
var minutes = 61; if(minutes<0 || minutes>60) { minutes = Number.NaN; } document.write(minutes); // NaN
var xv; if(xv==undefined) { document.write('xv is undefined'); }
var str = 'ab @# 78'; document.write(escape(str)); // ab%20@%23%2078
let str ="document.write('coursesweb.net');"; eval(str); // coursesweb.net
document.write(isFinite(123) +'<br>'); // true document.write(isFinite('string')); // false
document.write(isNaN(123) +'<br>'); // false document.write(isNaN('string')); // true
var dat = new Date(); document.write(Number(dat) +'<br>'); // 1296464847762 document.write(Number('0078')); // 78
document.write(parseFloat('12.8 pm')); // 12.8
document.write(parseInt('12.8 pm')); // 12
var dat = new Date(); document.write(String(dat)); // Mon Jan 31 2011 11:13:47 GMT+0200 (GTB Standard Time)
var str = 'ab%20@%23%2078'; document.write(unescape(str)); // ab @# 78
<input type="text" name="a_name" value="val" />
h3 { font-variant: small-caps; }
var msg = "Visit CoursesWeb.net"; alert(msg);
$ip = $_SERVER["REMOTE_ADDR"]; echo $ip;