I have only been working in Visualforce for a week, so forgive me if this is a stupid question.

I have a 'Custom Object' called 'Request__c'. I also have a custom object called 'Time_Entry__c' that is managed through a Visualforce page and is functionally a child of 'Request__c' and is displayed on the 'Request__c' form in Salesforce. I have some code where I am trying to pass the object id of the 'Request__c' object to the Apex method so that its value is included when I create a new instance (row) of the 'Time_Entry__c' object. However, the code that I have developed is not working. Please see the relevent code below. I would appreciate any help that I can get. Thank you so much.

VISUALFORCE code

<apex:page standardController="Request__c" extensions="TrController">
    <!--Because we will be defining 'Input' fields, we must wrap our code in a 'Form' block. -->
    <apex:form >
        <apex:pageBlock title="CDCR - Salesforce Time Reporting for Requests">
            <apex:pageBlockButtons >
                <!-- The following Button is defined in a more complicated fashion so that a parameter can be passed. -->
                <apex:commandButton >
                    <a href="javascript: CurrRequest('{!Request__c.Id}');" >New</a>               
                </apex:commandButton>
                <apex:commandButton value="Save" action="{!save}"/>
            </apex:pageBlockButtons>

...

       <apex:actionFunction action="{!add}" name="CurrRequest" reRender="">
            <apex:param name="EntryID" value="" assignTo="{!ReqID}"/>
        </apex:actionFunction>

    </apex:form>
</apex:page>

APEX Controller

public with sharing class TrController
{
    public List<Time_Entry__c> TimeEntries {get;set;}
    public string reqRslt {get;set;}
    public string showMessage {get;set;}
    //Used to get a hold of the entry record that is selected for deletion.
    public string SelectedEntryID {get;set;}
    public string ReqID {get;set;}
    public TrController(ApexPages.StandardController controller)
    {
        LoadData();
     }

...

    private void LoadData()
    {
        //Load the related time entry records from the database.
        //TimeEntries = [select id, Activity__c, Date_Worked__c, Hours_Worked__c, Minutes_Worked__c, Work_Description__c from Time_Entry__c WHERE name=:profileName order by ID DESC];

        TimeEntries = [select id, Activity__c, Date_Worked__c, Hours_Worked__c, Minutes_Worked__c, Work_Description__c, Related_Object__c from Time_Entry__c order by ID DESC];
    }
...

    public void add()
    {  
        //The following line will obetain the request id (ReqId) that is passed from the VisualForce page
        string RequestID = ReqId;
        //Build the default values to the new time entry record.
        Time_Entry__c entry = new Time_Entry__c(Activity__c='Research', Date_Worked__c=System.today(), Hours_Worked__c=' 0', Minutes_Worked__c='00', Related_Object__c=RequestID);
        //Insert the new default time entry row into the Salesforce database.
        Insert entry;
        //Call the method to reload the Visualforce list.
        LoadData();
    }