How to mail function in magento

http://www.magentocommerce.com/magento-connect/disable-email-notifications.html

validation with login

<script type="text/javascript">
/*
function demo()
{
var fn = document.getElementById("fn");
var email = document.getElementById("email");
var contact = document.getElementById("contact");
var pass = document.getElementById("pass");
var repass = document.getElementById("repass");

if((fn.value=="") || (fn.value.search(/^[A-Za-z]+$/)))
{
alert('Enter Name');
fn.focus();
return false;
}

var RegExEmail = /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}.$/i;

if((email.value=="") ||(!RegExEmail.test(email.value)))
{
alert('Enter email');
email.focus();
return false;
}

if((contact.value=="") || (contact.value.search(/^[0-9]+$/)) || (contact.value.length<10))
{
alert('Enter Contact');
contact.focus();
return false;
}

if((pass.value=="") || (repass.value==""))
{
alert('Enter password twise');
pass.focus();
return false;
}

if(pass.value!=repass.value)
{
alert('password not match');
pass.focus();
return false;
}
return true;
}
*/


</script>

<script type="text/javascript">

function demo(){

var fn = document.getElementById("fn");
var email = document.getElementById("email");
var contact = document.getElementById("contact");
var pass = document.getElementById("pass");
var repass = document.getElementById("repass");
var gender_m = document.getElementById("gender_m");
var gender_f = document.getElementById("gender_f");
var city = document.getElementById("city");

if(fn.value==''){
alert('Enter Name');
fn.focus();
return false;
}

if(fn.value.search(/^[A-Za-z]+$/)){
alert('Enter Valid Name');
fn.focus();
return false;
}

if(email.value.search(/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}.$/i)){
alert('Enter Valid Email');
email.focus();
return false;
}

if(contact.value.search(/^[0-9]+$/)){
alert('Enter Valid Contact');
contact.focus();
return false;
}

if(contact.value.length<10){
alert('Must Be Enter 10 Digit');
contact.focus();
return false;
}

if(pass.value!=repass.value){
alert('Password Not Match');
repass.focus();
return false;
}

if(gender_m.checked==false && gender_f.checked==false){
alert('Choose Gender');
gender_m.focus();
return false;
}

if(city.value==''){
alert('Select City');
city.focus();
return false;
}



return true;

}


</script>



<form name="form" action="#" method="post">
Name :-
<input type="text" name="Fname" id="fn" /><br /><br />
Email :-
<input type="text" name="Email" id="email"/><br /><br />
Contact :-
<input type="text" name="contact" id="contact" maxlength="10"/><br /><br />
Password :-
<input type="text" name="password" id="pass" /><br /><br />
Re-Password :-
<input type="text" name="repass" id="repass" /><br /><br />
Gender :-
<input type="radio" name="gender" id="gender_m" value="Male" />Male
<input type="radio" name="gender" id="gender_f" value="Female" />Female<br /><br />
City :-
<select id="city">
<option value="">--Select--</option>
    <option value="AHM">Ahmedabad</option>
</select><br /><br />
<input type="submit" name="submit" value="submit" onclick="return demo();" />
</form>
*********************************product*******************
  <form action="insert_product1.php" method="post" enctype="multipart/form-data">
    <table>
     <tr>
       <td>Name:</td>
      <tD><input type="text" name="t1"></td>
      </tr>
       <tr>
       <td>Price:</td>
      <tD><input type="text" name="t2"></td>
      </tr>
     
    <tr>
      <td>Category:</td>
       <td>
         <select name="t3">
             <option value="Electronic">Electronic</option>
             <option value="Mobile">Mobile</option>        
         </select>
     </td>
    </tr>
 
 
    <tr>
       <td>Descrition:</td>
      <tD><input type="text" name="t4"></td>
      </tr>
    <tr>
      <td>Photo</td>
      <td><input type="file" name="t5"></td>
   </tr>
          <tr>
           <td>&nbsp;</td>
           <td><input type="submit" value="submit"></td>
      </tr>
  </table>
  </form>

  <?php

    $conn=new PDO("mysql:dbname=ssit","root","");
    $result=$conn->query("select *from product");
     
?>
   <table border="1">
      <tr>
         <td>&nbsp;</td>
          <td>&nbsp;</tD>
        <td>Product Id</td>
        <td>Product Name</td>
         <td>Price</td>
        <td>Category</td>
         <td>Description</tD>
        <td>Photo</td>
        </tr>
            <?php
                while($row=$result->fetch())
               {
                  ?>
                   <tr>
                      <td><a href='deleteproduct1.php?x=<?php echo $row["pid"]; ?>'>Delete</a></td>
                       <td><a href='editproduct1.php?x=<?php echo $row["pid"]; ?>'>Edit</a></td>

                       <td><?php echo $row["pid"]; ?></td>
                       <td><?php echo $row["name"]; ?></td>
                       <td><?php echo $row["price"]; ?></td>
                       <td><?php echo $row["category"]; ?></td>
                       <td><?php echo $row["description"]; ?></td>
                       <td><img src='<?php echo $row["photo"]; ?>' height="50" width="50" ></td>

                   </tr>
               <?php  
               }
             ?>
   </table>

****************************insert*******************
<?php
      $na=$_POST["t1"];
      $p=$_POST["t2"];
      $ct=$_POST["t3"];
      $des=$_POST["t4"];
      $fname=$_FILES["t5"]["name"];
      $path="photo/".$fname;

      move_uploaded_file($_FILES["t5"]["tmp_name"],$path);
      $conn=new PDO("mysql:dbname=ssit","root","");
      $conn->query("insert into product(name,price,category,description,photo) values('".$na."','".$p."','".$ct."','".$des."','".$path."')");
      header("Location:product.php");
 
  ?>
******************edit*************
  <?php
    $id=$_GET["x"];
    $conn=new PDO("mysql:dbname=ssit","root","");
    $rs=$conn->query("select *from product where pid='".$id."'");
    $rw=$rs->fetch();
   

  ?>

<form action="updateproduct1.php" method="post" enctype="multipart/form-data">
    <input type="hidden" name="pid" value='<?php echo $rw["pid"]; ?>'>
    <table>
     <tr>
       <td>Name:</td>
      <tD><input type="text" value='<?php echo $rw["name"] ?>' name="t1"></td>
      </tr>
       <tr>
       <td>Price:</td>
      <tD><input type="text" value='<?php echo $rw["price"] ?>' name="t2"></td>
      </tr>
     
    <tr>
      <td>Category:</td>
       <td>
         <select name="t3">
             <?php
                    if($rw["category"]=="Electronic")
                    {
                ?>
             <option value="Electronic" selected>Electronic</option>
             <option value="Mobile">Mobile</option>
                    <?php
                          }
                          else
                          {
                    ?>
             <option value="Electronic">Electronic</option>
             <option value="Mobile" selected>Mobile</option>
 
                       <?php
                       }
                      ?>  
         </select>
     </td>
    </tr>
 
 
    <tr>
       <td>Descrition:</td>
      <tD><input type="text"  value='<?php echo $rw["description"] ?>' name="t4"></td>
      </tr>
    <tr>
      <td>Photo</td>
      <td><input type="file" name="t5">
           <img src='<?php echo $rw["photo"] ?>' width="30" height="30">
</td>
             
   </tr>
          <tr>
           <td>&nbsp;</td>
           <td><input type="submit" value="Update"></td>
      </tr>
  </table>
  </form>

  <?php

    $result=$conn->query("select *from product");
     
?>
   <table border="1">
      <tr>
         <td>&nbsp;</td>
          <td>&nbsp;</tD>
        <td>Product Id</td>
        <td>Product Name</td>
         <td>Price</td>
        <td>Category</td>
         <td>Description</tD>
        <td>Photo</td>
        </tr>
            <?php
                while($row=$result->fetch())
               {
                  ?>
                   <tr>
                      <td><a href='deleteproduct1.php?x=<?php echo $row["pid"]; ?>'>Delete</a></td>
                       <td><a href='editproduct1.php?x=<?php echo $row["pid"]; ?>'>Edit</a></td>

                       <td><?php echo $row["pid"]; ?></td>
                       <td><?php echo $row["name"]; ?></td>
                       <td><?php echo $row["price"]; ?></td>
                       <td><?php echo $row["category"]; ?></td>
                       <td><?php echo $row["description"]; ?></td>
                       <td><img src='<?php echo $row["photo"]; ?>' height="50" width="50" ></td>

                   </tr>
               <?php  
               }
             ?>
   </table>

*******************delete*****************
<?php
       $id=$_GET["x"];
       
      $conn=new PDO("mysql:dbname=ssit","root","");
      $conn->query("delete from product where pid='".$id."'");
      header("Location:product1.php");
 
  ?>
***************************************update
<?php
      $na=$_POST["t1"];
      $p=$_POST["t2"];
      $ct=$_POST["t3"];
       $des=$_POST["t4"];
       $id=$_POST["pid"];

 
      $conn=new PDO("mysql:dbname=ssit","root","");

          $fname=$_FILES["t5"]["name"];
        if($fname=="")
           {
      $conn->query("update product set name='".$na."',price='".$p."',category='".$ct."',description='".$des."' where pid='".$id."'");
         }
        else
           {
              $path="photo/".$fname;
move_uploaded_file($_FILES["t5"]["tmp_name"],$path);
             $conn->query("update product set name='".$na."',price='".$p."',category='".$ct."',description='".$des."',photo='".$path."' where pid='".$id."'");
           }
     header("Location:product1.php");
 
  ?>
***************multi login******
<?php
   session_start();
   $l=$_POST["t1"];
   $p=$_POST["t2"];
 


 
  $conn=new PDO("mysql:dbname=project","root","");
 
  $result1=$conn->query("select *from admin where loginid='".$l."' and password='".$p."'");
  if($row1=$result1->fetch())
   {
     header("Location:admin_welcome.php");
   }
   else
   {
 
   $result=$conn->query("select *From business where loginid='".$l."' and password='".$p."'");
 
   if($row=$result->fetch())
     {
 $_SESSION["rid"]=$row["rid"];
       header("Location:welcome_business.php");
    }
else
{
    $result2=$conn->query("select *From user where loginid='".$l."' and password='".$p."'");
        if($row2=$result2->fetch())
{
    $_SESSION["rid"]=$row2["uid"];
       header("Location:welcome_viewer.php");
 }
 else
  {

header("Location:login.php");
 }
}

}
 
  ?>