<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Asiahome Trading Corporation (Server)</title>
<script language="javascript" type="text/javascript">

function validate(){
var user = document.getElementById('username')
var pass = document.getElementById('password')

user.style.backgroundColor = (user.value.length == 0) ? "red" : "";
pass.style.backgroundColor = (pass.value.length == 0) ? "red" : "";

if(user.value.length == 0 || pass.value.length == 0){
        if (user.value.length == 0){
            user.focus();
            return false;
            }
        else if (pass.value.length == 0){
            pass.focus();
            return false;
            }
    }
else if (user.value.length != 0 || pass.value.length != 0){
    document.forms["frmLogin"].submit();
    }
}

</script>
</head>

<body>

<form id="frmLogin" method="post" action="sample.php">
<table width="254" border="0">
  <tr>
    <td width="100"></td>
    <td width="144"><input type="text" name="username" id="username" /><input type="password" name="password" id="password"/></td>
  </tr>
  <tr>
    <td></td>
    <td><input type="button" value="Login" onclick="validate()"/><input type="reset" value="Cancel" /></td>
  </tr>
</table>
</form>
</body>
</html>

this one is working, all i want happen is
how can i receive and post the value of username and password to another page(sample.php)
friendsssss plssss!!!!!!!!!!!!!!!!!!!!

This is Technically a PHP Question
The Answer is that you can access the value of username and password in sample.php using the global variable $_POST (because the form action is POST ) if it is GET then u use $_GET and and u need to pass to the $_POST the index (name) of the field that you want to capture its value as following

$username = $_POST;
$password = $_POST;

REMEMBER THAT THESE VALUES ARE ONLY ACCESSIBLE WHEN THE FORM IS SUBMITTED
If you tried to grab it without submitting the form you will get PHP ERROR

Amr87, actually i know how to do that in php. want i want is in javascript way.
how can i do post the value of my username and password using javascript.?

Tell me exactly what are you trying to do with this code?

what i want to happen is to send all value from one form and send it and post it to another page.

ok, you said you want to do POST operation for data from page to another and this is always handled by server side application like PHP

so javascript cant do that??? hmmm how about if am using cookie??? how can i code that?