Simple Hide and Show

<input type="radio" name="radio1" id="rbtnsurveyscratch"  value="2"
                        onclick="EditTable.style.display = 'block'; tblSurveyExisting.style.display = 'none'" />DIV-1
                    <input type="radio" name="radio1" id="rdbSurveyExisting" runat="server" value="1"
                        onclick="EditTable.style.display = 'none'; tblSurveyExisting.style.display = 'block'" />Div-2


<div id="EditTable" style="display:none">
    Div-1
</div>


<div id="tblSurveyExisting" style="display:none">
Div-2</div>