[SalesForce] ActionFunction not working properly.Values not getting passed to controller

I am facing this issue where PassValues() function is action function and i am passing some parameters to controller through actionfunction.I dont know whats going wrong the code is not flowing into the method..Even the debug system is not getting printed in logs..

I even saw many similar posts on this forum but didnot find any help..

The controller has many methods but for this vf page pls refer Save method only which is being called through action="{!Save}" ..

    <apex:page sidebar="false" showHeader="false" controller="PolicyHolderDetails">
<script type="text/javascript">
function GetValues(){
var Name=document.getElementById('input-id1').value;
var Phone=document.getElementById('input-id2').value;
var website=document.getElementById('input-id3').value;
var street=document.getElementById('input-id4').value;
var city=document.getElementById('input-id5').value;
var state=document.getElementById('input-id6').value;
var zipcode=document.getElementById('input-id7').value;
var fax=document.getElementById('input-id8').value;
var industry=document.getElementById('input-id9').value;
if(Name=='')
{
//alert('error');
document.getElementById('div1').innerHTML='Please Enter Policy Holder Name';
return false;
}
if(Name!=''){
alert(Name);
 PassValues(Name,Phone,website,street,city,state,zipcode,fax,industry);
alert('Details submitted successfully'); 
}                  
}
</script>
  <apex:slds />
  <apex:form >
 <center> <h1 style="font-size: 20px;">Fill out our form and get benefits..</h1></center>
 <div class="slds-form-element slds-text-title_caps" >
  <label class="slds-form-element__label " for="input-unique-id1">Policy Holder Name</label>
  <div class="slds-form-element__control is-required slds-has-error" id="div1" style="width: 350px;">
    <input type="text" id="input-id1" class="slds-input" required=""/><br/><br/>
  </div>
  <label class="slds-form-element__label" for="input-unique-id2">Phone</label>
  <div class="slds-form-element__control" style="width: 200px;">
    <input type="Number" id="input-id2" class="slds-input" /><br/><br/>
  </div>
  <label class="slds-form-element__label" for="input-unique-id3">Website</label>
  <div class="slds-form-element__control" style="width: 350px;">
    <input type="text" id="input-id3" class="slds-input" /><br/><br/>
  </div>
  <fieldset class="slds-form-element">
      <legend class="slds-form-element__label ">Address</legend>
      <div class="slds-form-element__group">
        <div class="slds-form-element__row">
          <div class="slds-form-element slds-size_1-of-1" style="width: 350px;">
            <label class="slds-form-element__label" for="input-04">Street</label>
            <input type="text" id="input-id4" class="slds-input"/><br/><br/>
          </div>
        </div>
        <div class="slds-form-element__row">
          <div class="slds-form-element slds-size_1-of-2" style="width: 350px;">
            <label class="slds-form-element__label" for="input-05">City</label>
            <input type="text" id="input-id5" class="slds-input"/>
          <!--</div>-->
         <!-- <div class="slds-form-element slds-size_1-of-2" style="width: 350px;">-->
            <label class="slds-form-element__label" for="input-06">State</label>
            <input type="text" id="input-id6" class="slds-input"/><br/><br/>
          </div>
        </div> 
        <div class="slds-form-element__row">
          <div class="slds-form-element slds-size_1-of-2" style="width: 300px;">
            <label class="slds-form-element__label" for="input-07">ZIP Code</label>
            <input type="number" id="input-id7" class="slds-input"/><br/><br/>
          </div>
        </div>
      </div>
    </fieldset>
  <label class="slds-form-element__label" for="input-unique-id8">Fax</label>
  <div class="slds-form-element__control" style="width: 350px;">
    <input type="Number" id="input-id8" class="slds-input"/><br/><br/>
  </div>
   <label class="slds-form-element__label" for="input-unique-id9">Industry</label>
  <div class="slds-form-element__control" style="width: 350px;">
    <input type="text" id="input-id9" class="slds-input" /><br/><br/>
  </div>
  </div>
 <center> <button Class="slds-button slds-button_destructive" id="btn" Onclick="GetValues()">Submit</button></center>
 <apex:actionFunction name="PassValues" action="{!Save}">
 <apex:param name="P1" value=""/>
 <apex:param name="P2" value=""/>
 <apex:param name="P3" value=""/>
 <apex:param name="P4" value=""/>
 <apex:param name="P5" value=""/>
 <apex:param name="P6" value=""/>
 <apex:param name="P7" value=""/>
 <apex:param name="P8" value=""/>
 <apex:param name="P9" value=""/>

</apex:actionFunction>
</apex:form>
</apex:page>

//controller    
Public class PolicyHolderDetails {
    Public string Name{get;set;}
    Public String PhoneNo{get;set;}
    Public string Website{get;set;}
    Public string Street{get;set;}
    Public string City{get;set;}
    Public string State{get;set;}
    Public String Zipcode{get;set;}
    Public string Fax{get;set;}

    Public String Industry{get;set;}
    Public String Insurance1{get;set;}
    Public String Insurance2{get;set;}
    Public String Insurance3{get;set;}
    Public String Insurance4{get;set;}

    Public String Nominee{get;set;}
    Public String PaymentMode{get;set;}
    Public String PaymentOptions{get;set;}
    Public String PolicyCoverage{get;set;}
    Public Date EnrollmentDate{get;set;}
    Public String Tenure{get;set;}

    Public void CheckInsurance(){
     Insurance1=Apexpages.currentPage().getParameters().get('Param1');
     Insurance2=Apexpages.currentPage().getParameters().get('Param2');
     Insurance3=Apexpages.currentPage().getParameters().get('Param3');
     Insurance4=Apexpages.currentPage().getParameters().get('Param4');
        System.debug(LoggingLevel.Info, 'HELLO');
     if(Insurance1=='Health Insurance'){
       system.debug('HIHIH:::::::'+Insurance1);
     system.debug(Insurance1);
       policy__c Pid=[select id from policy__c where Policy_Name__c='Health Insurance'][0];
        Account a=[Select id from Account where name=:Name][0];

      }
      if(Insurance2=='Home Insurance'){
       system.debug('HIHIH:::::::'+Insurance1);
     system.debug(Insurance1);
       policy__c Pid=[select id from policy__c where Policy_Name__c='Health Insurance'][0];
        Account a=[Select id from Account where name=:Name][0];

      }
      if(Insurance3=='Life Insurance'){
       system.debug('HIHIH:::::::'+Insurance1);
     system.debug(Insurance1);
       policy__c Pid=[select id from policy__c where Policy_Name__c='Health Insurance'][0];
        Account a=[Select id from Account where name=:Name][0];

      }
      if(Insurance4=='Automobile Insurance'){
       system.debug('HIHIH:::::::'+Insurance1);
     system.debug(Insurance1);
       policy__c Pid=[select id from policy__c where Policy_Name__c='Health Insurance'][0];
        Account a=[Select id from Account where name=:Name][0];

      }
    }

    Public PageReference Save(){ 
    system.debug('hihi:::'); 
    Name=Apexpages.currentPage().getParameters().get('P1');
    PhoneNo=Apexpages.currentPage().getParameters().get('P2');
    Website=Apexpages.currentPage().getParameters().get('P3');
    Street=Apexpages.currentPage().getParameters().get('P4');
    City=Apexpages.currentPage().getParameters().get('P5');
    State=Apexpages.currentPage().getParameters().get('P6');
    Zipcode=Apexpages.currentPage().getParameters().get('P7');
    Fax=Apexpages.currentPage().getParameters().get('P8');
    Industry=Apexpages.currentPage().getParameters().get('P9');
    Account a=new Account(name=Name,Phone=PhoneNo,Website=Website,BillingStreet=Street,BillingCity=City,
     BillingState=State,Fax=Fax,Industry=Industry,BillingPostalCode=Zipcode);
     system.debug(a);
    insert a;
     system.debug(a);
    return null;
    }

    Public PageReference SaveAgreement() {
    system.debug('HHIIH:::');
      Agreement__c ag=new Agreement__c(Policy__c='a007F0000033ROm',Policy_Holder__c='0017F000007Ndrv',Nominee__c=Nominee,Payment_mode__c=PaymentMode,
      Payment_Options__c=PaymentOptions,Policy_Coverage__c=PolicyCoverage,
        Enrollment_Date__c=EnrollmentDate,Tenure__c=Tenure);
       insert ag; 
            return null;
        }

    }