I made a website- it s not a domain it s just one like freewebs.com/mywebsitename but can you use javascript on it? it s like not working

once again- being the huge n00b i am at javascript I would like to know how to make a code (IN ENGLISH) on how to make a rollover effect with 2 pictures on a link.

So i have this site- and I want an enter link on the page. The two images I ll being using are

http://i28.tinypic.com/21oac0l.jpg

and

http://i28.tinypic.com/2gtwxw3.png

So- anyone have the code so that when I hover over the first image- it will turn into the second? Okay- also this is a picture link. Hope you can help =] thanks for tryng

how do i watch videos on my psp not download them watch them i want to watch videos on youtube i have javascript but its says that its turned off but its turned on

It says "Hello- you either have JavaScript turned off or an old version of Adobe s Flash Player" for two days now- and normally I would sign out and sign back in again then I will be fine- but now its evertime HELP ME!!!

Write a HTML page containing an HTML form to capture the following properties from the user:
a.Name (text box)
b.Address (text area)
c.Phone (text box)

Write javascript functions

(1)to validate Name to contain only alphabets and of maximum length should be 25 ; Show appropriate messages on failure
(2)to validate Address field to contain maximum length of 200 characters; Show appropriate on failure and focus the ‘Address’ field text area
(3)to validate phone number to contain only numeric data; show appropriate messages on failure

I am in a javascript class and in my assignment I have to take three radio buttons in a group and figure out which one is selected. They all have the same name. This is a sandwhich shop he is having us build. The form name is frmMain. Here is what I have so far.

<h3>Size</h3>
<input type="radio" name="radSize" value="Manly Man($4.99)" />Manly Man($4.99) <input type="radio" name="radSize" value="Girly Man($5.99)" />Girly Man($5.99) <input type="radio" name="radSize" value="Super Girly Man($6.99)" />Super Girly Man($6.99)

<script type="text/javascript">
var Total;

function ComputeTotal()
{
if(document.frmMain.radSize[0].checked == true)
{
Total = 4.99;
}
else if(document.frmMain.radSize[1].checked == true)
{
Total = 5.99;
}
else if(document.frmMain.radSize[2].checked == true)
{
Total = 6.99;
}
else
{
alert("Please Choose a Size");
}
}