Javascript Alert Example

This text only gets loaded AFTER the alert box is closed...

The following <script> section is placed into the <head> section of your html; view the source code of this html page for full coding.
<script language="javascript">

document.write(" If you can read this, then your browser is javascript-enabled. ");

window.alert(" Push my button! ");

</script>
The <script language="javascript"> tag tells the browser to begin interpreting javascript commands and syntax.

Notice the DOM addressing; write is a javascript command to "write the following string (series of alphanumeric letters or numbers)", and document is the current document. write to the current document, "If you can read this, then your browser is javascript-enabled".

After that command has been read and executed, the next command is read and executed:
alert creates an "alert" box in a new window outside the current browser window, with the text, "Push my button!"

The alert box's button must be pushed before the script can finish, and then the <body> section of the html may load, and you can see this explanation text.