The Global object has properties and methods at the highest level, without a parent object. This means that global properties and functions can be used with all the built-in JavaScript objects.


• The Global object has three properties:
Global object methods (or functions):
- In the following example is a JS script that uses the method eval() twice, transform and interpret the argument received as a JavaScript code.
<script type="text/javascript"><!--
function calcs(form) {
  form.re.value = eval(form.expr.value);
}
eval("alert('Have a good life!')");
--></script>
<form>
 <p>Enter a mathematical expression (addition, subtraction, multiplication, division), for example (7*8 or 3+8/2): </p>
 <input type="text" name="expr" size="35" />
 <input type="button" name="calc" value="Calculation" onclick="calcs(this.form)" /><br />
 The result is:
 <input type="text" name="re" size="18">
</form>
- This code displays an alert window and then the following result. A form that you can use for simple math operations:

Enter a mathematical expression (addition, subtraction, multiplication, division), for example (7*8 or 3+8/2):


The result is:

Daily Test with Code Example

HTML
CSS
JavaScript
PHP-MySQL
Which HTML5 tag is indicated to be used as container for menu with navigation links in Web site?
<section> <nav> <article>
<nav><ul>
 <li><a href="http://coursesweb.net/css/" title="CSS Course">CSS Course</a></li>
 <li><a href="http://www.marplo.net/jocuri/" title="Flash Games">Flash Games</a></li>
</ul></nav>
Which CSS property shifts an item horizontally to the left or right of where it was?
text-align clear float
.some_class {
  width: 30%;
  float: left;
}
Click on the Math object method which returns x, rounded downwards to the nearest integer.
Math.ceil(x) Math.abs(x) Math.floor(x)
var num = 12.34567;
num = Math.floor(num);
alert(num);       // 12
Indicate the PHP function which returns the number of characters in string.
mb_strlen() count() stristr()
$str = "string with utf-8 chars åèö";
$nrchr = mb_strlen($str);
echo $nrchr;        // 30
Global Object

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