<script>
    var flag=0;
    var SelectConId1='';
    function checkAll(cb)
    {
        flag=0;
        SelectConId1='';
        var inputElem = document.getElementsByTagName("input");
        for(var i=1; i<inputElem.length; i++)
        {
            if(inputElem[i].id.indexOf("checkedone")!=-1)
            {
                inputElem[i].checked = cb.checked;
                flag=flag+1;
                SelectConId1=SelectConId1+inputElem[i].name+',';
            }
        }
        if(cb.checked!=true)
        {
            SelectConId1="";
            flag=0;
        }
        //alert(SelectConId1);

    }

    function checkone(cb,conid)
    {

       var inputElem = document.getElementsByTagName("input");
        for(var i=1; i<inputElem.length; i++)
        {
            if(inputElem[i].id.indexOf("checkedone")!=-1)
            {
                if(inputElem[i].name!=cb.name && cb.className==inputElem[i].className)
                {
                    inputElem[i].checked=false;
                }
            }
        }


    }

    function search_element()
    {
        //alert('hello');
        var element=document.getElementById("searchtext").value;
       // alert(element);
        searchelement(element);
        return false;
    }
    function addtolist()
    {

        if((SelectConId1.length)<=1)
        {
            alert('Please select at least one Answer Choice');
            return false;
        }
        else
        {
            addtolistcontact();
        }
    }

    function addtolistcontact()
    {
    }
    function closethis()
    {

    }
    </script>
    <apex:pageBlock >
        <apex:pageBlockSection columns="1" collapsible="false">
            <apex:repeat var="q" value="{!wrapList}">
                <apex:pageBlockSection title="{!q.ques.Title__c}" columns="1" >
                    <apex:pageBlockTable var="qc" value="{!q.qcList}" id="quesList">
                       <apex:column >
                 <input type="checkbox" class="{!q.ques.Id}" name="{!qc.id}" id="checkedone"  onclick="return checkone(this,'{!qc.id}')"  />
                </apex:column>
            <div id="{!qc.id}">
             <apex:column >
                <!--<apex:facet name="header" >Name</apex:facet>-->
                {!qc.Title__c}
                    </apex:column>
               </div>
                   </apex:pageBlockTable>
                </apex:pageBlockSection>
            </apex:repeat>
        </apex:pageBlockSection>
    </apex:pageBlock>
</apex:form>

public void showRecords(){
    //String  selectedId = ApexPages.currentPage().getParameters().get('pid');
    List<Question__c> quesList = [select id,Title__c,(select id, Name, Title__c from QuestionChoices__r), Name from Question__c ];
    for(Question__c q :quesList){

        List<QuestionChoice__c>qcList = q.QuestionChoices__r;
        wrapList.add(new wrap(q,qcList));
    }
}

 public class wrap{
    public Question__c ques{get; set;}
    public List<QuestionChoice__c> qcList{get; set;}

    public wrap(Question__c ques, List<QuestionChoice__c> qcList){
        this.ques = ques;
        this.qcList = qcList;
    }
}