Opening an Alert Box in Javascript

alert() is a built-in Javascript method.

A little tricky here with the quotation marks (See IMPORTANT note below).

Put what you want the alert to display in single or double quotation marks.

Example in a script:

alert("Do Not Leave My Site!");

Example in a link:

<a href="http://google.com" onClick="alert('You are going to Google!');return true">Google</a>


When passing a varible to alert(), use no quotation marks at all.

var ko = "Google me.";
alert(ko);

Quotation marks around ko would display the word ko rather than the value of the variable ko.


IMPORTANT:

-In a script: Backslash out quotes in your display text or make them opposite the containing marks. Examples:

alert("He said \"hey man\"");
alert('He said \'hey man\'');
alert("He said 'hey man'");
alert('He said "hey man"');

alert("Don't leave my site");
alert('Don\'t leave my site');

-In a link: Backslash out quotes in display text. Example:

<a href="#" onClick="alert('Doesn\'t go to Google');return true">Google</a>


You can look at that as being complicated or you can see it as flexible.


Copy and Paste Javascript (two ways to use):

In a link:

<a href="http://google.com" onClick="alert('You are going to Google!');return true">Google</a>

In a script:

<script type=text/javascript>
<!--
alert("Don't Leave My Site!");
-->
</script>


Note: When using in a link, the "return true" means go to the link that is being clicked on. "return false" stops the browser from going to the link.


Alert Box - See in Action (new window)

Previous Article: Opening a REMOTE WINDOW in Javascript

Next Article: Passing an Argument or Variable to a Javascript