JavaScript: Beginner

Okay, so we've got this website...now let's make it interesting. We have no functionality here, so what's the point? In JavaScript, your website comes to life.

You place JavaScript code between the <script language="JavaScript"> tag and the </SCRIPT> tag.

Here is an example of JavaScript code. This code would check to see if there is a number entered into a text box (or anything at all) and then divides the number by two before alerting it in an alert box. (text box and button not included)

<script language="JavaScript">
function doitforme()
{
if(Formname.textboxname.value.length == 0)
{
alert("You have nothing entered!")
} else {
var number = parseInt(Formname.textboxname.value)
if(isNaN(number))
{
alert("There is no number there!")
} else {
var newnum = number/2
alert("The new number is "+newnum+".")
}
}
}

You do not have to understand the code, just note how it is different from HTML. Remember this comes in the website.

Have fun with JavaScript! Good luck!