function OpenModelPopup()
    { 
        document.getElementById ('tdDisplayName').innerHTML='';
        document.getElementById ('txtRefID').value='';
        document.getElementById ('ModalPopupDiv').style.visibility='visible';
        document.getElementById ('ModalPopupDiv').style.display='';
        document.getElementById ('ModalPopupDiv').style.top= Math.round ((document.documentElement.clientHeight/2)+ document.documentElement.scrollTop)-100 + 'px';
        document.getElementById ('ModalPopupDiv').style.left='400px';
        
        document.getElementById ('MaskedDiv').style.display='';
        document.getElementById ('MaskedDiv').style.visibility='visible';
        document.getElementById ('MaskedDiv').style.top='0px';
        document.getElementById ('MaskedDiv').style.left='0px';
        document.getElementById ('MaskedDiv').style.width=  document.documentElement.clientWidth + 'px';
	document.getElementById('MaskedDiv').style.height = document.getElementById('container2').offsetHeight + 'px';
    }
    function CloseModelPopup()
    {
        document.getElementById ('MaskedDiv').style.display='none';
        document.getElementById ('ModalPopupDiv').style.display='none';
    }
     function Submit()
    {
        if (document.getElementById('txtRefID').value != '')
        {
            document.getElementById ('MaskedDiv').style.display='none';
            document.getElementById ('ModalPopupDiv').style.display='none';
            window.open("result.aspx?RefID=" + document.getElementById('txtRefID').value + "&MembershipType=" + document.getElementById('Membership').value,null, "height=350,width=400,status=yes,toolbar=no,menubar=no,location=no");
        }
        else 
        {
            alert ('Please enter your Reference ID');
        }
    }