js中分頁操作 當壹頁操作完成後後續頁面無法操作

document.frmPage.action = "worker.let?cmd=list&pageIndex="+document.frmPage.pageIndex.value;

return true;

}

<form name="frmPage" action="“ method="post" onsubmit="pageOnChange()">

<select name="pageIndex" >

<option value="">--請選擇--</option>

<c:forEach var="i" begin="1" end="${total}" >

<option value="${i}">第${i}頁</option>

</c:forEach>

</select>

<input type="submit" value="Go"/>

</form>

改成這樣或者submit換成button