Begin Jquery from zero !

I started to learn jquery from zero, but it is easy to understand. JQuery is a platform to support programmers in developing applications on the web platform. JQuery's slogan is "Write less, do more”.
First step, download file jquery, Current Release is 1.3.2 from
http://docs.jquery.com/Downloading_jQuery

And now we learn how to use jQuery. Create an HTML document with the following contents:

Code:
<html>
<head>
<script type="text/javascript" src="path_to/jquery.js"></script>
<script type="text/javascript">
// Your code goes here
</script>
</head>
<body>
<a href="http://jquery.com/">jQuery</a>
</body>
</html>

You must point to the path where you save the file jquery. If the same directory as the HTML file you can use
Code:
<script type="text/javascript" src="jquery.js"></script>
Copy the code below and insert into your HTML document. Our JQuery code will be placed inside this function, they will be executed when the document is ready:

Code:
$(document).ready(function(){
// your Jquery code from here
});

For example:

Code:

<html>
<head>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
   $(document).ready(function(){
$("a")
.filter(".clickme")
.click(function(){
alert("You are now leaving the site.");
})
.end()
.filter(".hideme")
.click(function(){
$(this).hide();
return false;
})
.end();
});

</script>
</head>
<body>
<a href="http://google.com/" class="clickme">I give a message when you leave</a>
   <a href="http://yahoo.com/" class="hideme">Click me to hide!</a>
   <a href="http://microsoft.com/">I'm a normal link</a>

</body>
</html>
One more example!

Code:
<html>
<head>
<script src="jquery.js"></script>

<script>
$(document).ready(function(){

$("button").click(function () {
$("p").toggle();
});

});
</script>

</head>
<body>
<button>Toggle</button>
<p>Hello</p>
<p style="display: none">Good Bye</p>
</body>
</html>

From now you can study with a lot effect at: http://docs.jquery.com/Effects.
There are many examples, demos and full code for you learning!

By a little guide with the way that I understand, hopefully you will enjoy JQuery