자바스크립트 날짜 비교

<script language="javascript">
function test(){

    var s_y = document.getElementById('s_y');
    var s_m = document.getElementById('s_m');
    var s_d = document.getElementById('s_d');
    var n_y = document.getElementById('n_y');
    var n_m = document.getElementById('n_m');
    var n_d = document.getElementById('n_d');
    var e_y = document.getElementById('e_y');
    var e_m = document.getElementById('e_m');
    var e_d = document.getElementById('e_d');

    var sday=new Date();
    var nday=new Date();
    var eday=new Date();

    sday.setFullYear(s_y.value,s_m.value,s_d.value);
    nday.setFullYear(n_y.value,n_m.value,n_d.value);
    eday.setFullYear(s_y.value,e_m.value,e_d.value);

    if(sday < nday && nday < eday){
        alert('마감되었습니다');
    }else{
        alert('아직남았네요');
    }

}
</script>

DATE1
<input type="text" id="s_y" value="2004" size="5">-
<input type="text" id="s_m" value="6" size="5">-
<input type="text" id="s_d" value="1" size="5">
<br>
임의의 날짜
<input type="text" id="n_y" size="5" value="2004">-
<input type="text" id="n_m" size="5" value="6">-
<input type="text" id="n_d" size="5" value="5">
<br>
DATE2
<input type="text" id="e_y" value="2004" size="5">-
<input type="text" id="e_m" value="6" size="5">-
<input type="text" id="e_d" value="30" size="5">
<input type="button" value="확인해봅시다" onClick="test();">