Hi folks i'm new with salesforce, do you have any idea on how can I hide this page table? meaning, onload, no records found, but after clicking the button search, it will display the pagetable result, my problem is it still displays the columns headers onload meaning still without any idea.

<apex:pageBlock title="Final Records">
    <apex:outputPanel layout="block" styleClass="noRecords" rendered="{!conlist.size == 0}"><i> No Records </i>
                </apex:outputPanel>
                <apex:outputPanel layout="block" styleClass="noRecords" rendered="{!conlist.size == NULL}"><i> No  Record </i>
                </apex:outputPanel>
                <apex:pageblocktable value="{!conlist}" var="con" id="pv">
                    <apex:column headerValue="Account Name>  
                        <apex:outputlink value="https://ap1.salesforce.com/{!conlist.Account.id}">{!conlist.Account.Name}</apex:outputlink>  
                    </apex:column>
                    <apex:column headerValue="Country}" value="{!conlist.Account.BillingCountry}" />
                        <apex:outputlink value="https://ap1.salesforce.com/{!conlist.id}"{!conlist.FirstName}</apex:outputlink>  
                    </apex:column>
                </apex:pageblocktable>