Using JavaScript
There are three approaches to using JavaScript in your Web pages -
| 1. Write the code as part of the page HTML between
<SCRIPT>, </SCRIPT> tags. eg. .... <BODY> ..... <SCRIPT> ..... document.write("Hello World") ..... ..... </SCRIPT> ..... </BODY> |
| 2. Define a function and then "call" it
later in the HTML. eg function Multiply(x,y) { var result = x * y return result } This could be 'called' later in
the page using: |
| 3. Insert a JavaScript command as part of an
'anchor' statement (ie as part of <A HREF= ........>........</A>) eg <BODY> ..... <A HREF = "#" onMouseOver = "window.alert( )"> This is a MouseOver position </A> ..... </BODY> |
NOTE: Approach 1 can be simply inserted into your HTML page at any point. Approach 2 requires you to 'declare' the function between the <HEAD>, </HEAD> markers at the top of the page. You will also need to declare that you are using JavaScript commands with <SCRIPT language="JAVASCRIPT"> and later turn it off with </SCRIPT>. The following screens give examples of each approach.