php – html中单页的多个Web服务请求

我已经尝试在单个表单中使用它但是然后我如何发送Web请求以发送验证引脚和验证移动按钮.

我有三个这样的形式,

//First Form Take Mobile Number,web service will send verification Pin as reply to this action
    <form name="PhoneVerification" action="url to phone verification web service" >
    Phone Number: <input type="text" name ="number" id="phone">
    <input type="submit" name ="submit1" id="submit1">Verify Mibile Number</input>
    </form>

//Second Form verifies pin Locally which is sent by first service
    <form name="PinVerification" action="verify pin came from previous web service">
    Verification Pin(Sent on Mobile Number): <input type="text" name ="pin" id="pin">
    <input type="submit" name ="submit2" id="submit2">Verify Pin</input>
    </form>

//Third Form Will Take Mobile Number Previously Entered. and email/password and Complete Signup
    <form action="web service call to complete signup">
    Email: <input type="text" name ="email" id="email">
    Password: <input type="text" name ="pass" id="pass">
    PasswordAgain: <input type="text" name ="passAgain" id="passAgain">
    <input type="submit" name ="submit3" id="submit3">Complete Signup</input>
    </form>

问题是我无法获得电话号码的价值,因为页面在表单提交后刷新.

我读了一些关于使用AJAX的线程,但是如何在这种情况下使用Ajax.
我怎样才能做到这一点.使用AJAX,或使用PHP.