Untitled

<head>
 <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
</head>
<body>

<?php

$user="localhost";
$username="root";
$pass="";
$db="surti_office";

$conexion=mysqli_connect($user,$username,$pass,$db)or die  ("ERROR DE CONEXION");
?>

<?php
$consultar="SELECT * FROM producto where total_oferta_iva >1 ORDER by idproducto desc limit 20";
$resultado=$conexion->query($consultar);
while ($resultados=$resultado->fetch_assoc()){
?>
<form action="#" id="formulario">

<input type="text" id="input" name="<?php echo $resultados['idproducto']?>" value="<?php echo $resultados['idproducto']?>">
<input type="submit" value="Enviar" />
</form>
<?php }?>

<script type="text/javascript">
$(document).ready(function(){
    $("#formulario").submit(function(){
        var cadena="";
        cadena = $(this).serialize();
     alert(cadena);
     return false;
     });
     });
</script>