javascript - how to remove duplicate values from my select dropdown list? -

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this jsp code:

<form method="post" action="" >     <table style="width: 100%;border: 0px;border-spacing: 0px;padding: 0px;">     <tr>      <td style="height: 28px; font-size: 14px; width:80px; ">select state :</td>      <td style="text-align: left; padding-left: 10px; width: 450px;">           <select name="city"  onchange="consituteshow(this.value)">                       <option value="">andhra pradesh</option>                       <%                                             statement stmt=null;                                             dbconnection db=new dbconnection();                                             connection con=db.dbconn();                                             try{                                             stmt = con.createstatement();                                               resultset rs = stmt.executequery("select distinct stateid,state election_history;");                                             while(rs.next())                                             {                       %>                                             <option value="<%=rs.getstring(2)%>"><%=rs.getstring(2)%></option>                         <%}%>        </select>     </td>    </tr>  </table> </form>

above jsp code , in code have given 'andhra pradesh' default name.due inside dropdown list 'andhra pradesh' printed twice.is there way remove it???

check if name "andhra pradesh" , if select option selected="selected"

 <!-- no default option here -->  <option value=""></option>        <%      while(rs.next()){            if( !rs.getstring(2).equals("andhra pradesh") ){             <option  value="<%=rs.getstring(2)%>"><%=rs.getstring(2)%></option>           }else{             <option selected="selected" value="<%=rs.getstring(2)%>"><%=rs.getstring(2)%></option>           }     }     %>

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