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 tag is used in <table> to create table header cell?
<thead> <th> <td>
<table><tr>
  <th>Title 1</th>
  <th>Title 2</th>
</tr></table>
Which CSS property sets the distance between lines?
line-height word-spacing margin
.some_class {
  line-height: 150%;
}
Which function opens a new browser window.
alert() confirm() open()
document.getElementById("id_button").onclick = function(){
  window.open("http://coursesweb.net/");
}
Indicate the PHP function that returns an array with names of the files and folders inside a directory.
mkdir() scandir() readdir()
$ar_dir = scandir("dir_name");
var_export($ar_dir);
Global Object

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