wrapper another

public class ProductList {

    public String name                       {set;get;}

    public Integer quantity {set;get;}

    public Decimal price    {set;get;}

    public Boolean tax                       {set;get;}

    public Boolean flag      {Set;get;}

    public Decimal total     {set;get;}

    public Decimal cost      {set;get;}

    public Decimal taxamount{set;get;}

}

public class ProductExample {

    public List<ProductList> products {Set;get;}

    public Integer rowid   {set;get;}

    public ProductExample(){

        products=new List<ProductList>();

        addMore();

    }

    public void submit(){

       

    }

    public void getData(){

       String pname=products.get(rowid).Name;

       ProductData__C p=[select Name,Tax__c,Price__C from ProductData__c where name=:pname limit 1];

       products.get(rowid).price=p.price__c;

       products.get(rowid).tax=p.tax__c;

    }

    public void add(){

        ProductList p=products.get(rowid);

        if(rowid<products.size())

            products.add(rowid+1,p);

        else

            products.add(p);

    }

    public void deleteRow(){

        products.remove(rowid);

    }

    public void addMore(){

        for(Integer i=0;i<=4;i++){

            ProductList pl=new ProductList();

            products.add(pl);

        }

    } 

    public void reset(){

        products.clear();

        addMore();

    }

}

<apex:page controller="ProductExample" id="page">

    <script>

  

                function getRow(myid){

            var rowid=myid.split(':');

            document.getElementById('page:fm:hidden').value=rowid[4];

          

        }

                function callme(myid){

            getRow(myid);

            rowData();

        }

                function getData(myid){

            var rowid=myid.split(':');

            var price=document.getElementById('page:fm:pb:pbt:'+rowid[4]+':price').value;

            var quantity=document.getElementById('page:fm:pb:pbt:'+rowid[4]+':quantity').value;

            var total=price*quantity;

                document.getElementById('page:fm:pb:pbt:'+rowid[4]+':cost').value=total;

        }

    </script>

       

    <apex:form id="fm">

        <apex:actionFunction name="rowData" action="{!getData}" reRender="pb" />

        <apex:inputHidden value="{!rowid}" id="hidden" />

                <apex:pageBlock title="ProductList" id="pb" >

                <apex:pageBlockTable value="{!products}" var="a" id="pbt">

                <apex:column >

                    <apex:inputCheckBox value="{!a.flag}" />

                    <apex:facet name="header"><apex:inputCheckbox />

                    </apex:facet>

                </apex:column>

                <apex:column headerValue="Product Name">

                    <apex:inputText value="{!a.name}" size="10" id="name" onchange="callme(this.id)" />

                      

                

                </apex:column>

                 <apex:column headerValue="Price">

                    <apex:inputText size="4" value="{!a.price}" id="price" />

                </apex:column>

                 <apex:column headerValue="Quantity">

                    <apex:inputText size="4" value="{!a.quantity}" id="quantity" onchange="getData()" />

                </apex:column>

                 <apex:column headerValue="Tax">

                    <apex:inputCheckbox value="{!a.tax}" />

                </apex:column>

                <apex:column headerValue="Cost">

                    <apex:inputText size="4" value="{!a.cost}" id="cost" />

                </apex:column>

                <apex:column headerValue="TaxAmount">

                    <apex:outputText value="{!a.taxAmount}" />

                </apex:column>

                <apex:column headerValue="Total">

                    <apex:outputText value="{!a.total}" />

                </apex:column>

                <apex:column headerValue="Action">

                    <apex:commandButton value="Add" id="b1" onclick="getRow(this.id)"  action="{!add}"/>

                    <apex:commandButton value="Del" id="b2" onclick="getRow(this.id)" action="{!deleteRow}"/>

                </apex:column>

            </apex:pageBlockTable>

            <apex:pageBlockButtons location="bottom">

                <apex:commandButton value="AddMore" action="{!addMore}" />

                <apex:commandButton value="Submit" action="{!submit}" />

                <apex:commandButton value="Reset" action="{!reset}" />

            </apex:pageBlockButtons>

        </apex:pageBlock>

    </apex:form>

</apex:page>