JavaScript is a scripting language that uses objects. For example, your browser window is an object. We can refer to this object via JavaScript by using "window."
The following is a method (action) of the window object. This method is envoked by using the following code:
window.alert("Welcome to my Web page!");
Here's the code used to create the window.alert: <script language="javascript" type="text/javascript">
window.alert("Welcome to my Web page!");
</script>