Untitled

<!DOCTYPE html>

<form action = "form.php" >

Username <input type = text name = "user" >  <br>
<br><br>
Password <input type = text name = "pass" > <br><br>


</form>

<style>#amount    { display : none ;    background: white;  }</style>
<style>#field {width 70%    ;   margin: auto;               }</style>
<script>
function appear ( ) {
ptr1 = document.getElementById("amount")
ptr2 = document.getElementById("choice")
$menuvalue = ptr2.value;
if ( $menuvalue == "D") {ptr1.style.display = "block" ; return ;}
else if ($menuvalue == "S") {ptr1.style.display = "none";  return ;}
else if ($menuvalue == "W") {ptr1.style.display = "block";  return ;}
else if ($menuvalue == "") {ptr1.style.display = "none";  return ;}


}
</script>
<form  action = "form.php" >


<fieldset id="field"><legend> Please Select A Service Below <br><br></legend>
<input type = "number" text step = "1" name="amount" id="amount"
        autocomplete = "off" placeholder = "Amount" required><br><br>
<select name="choice"    id ="choice" onchange="appear()" >
<option value="" > Choose </option>
<option value="S" > Show </option>
<option value="D" > Deposit </option>
<option value="W" > Withdraw </option>
</select><br><br>
<input type=submit>
</fieldset>
</form>

<br><br>