[jQuery] selectbox 선택 변경시 textbox 노출/비노출

[jQuery] selectbox 선택 변경시 textbox 노출/비노출

- aspx

<tr> <th>거래유형 <span class="color01">*</span></th> <td colspan="3"> <% dt = ds.Tables[2]; %> <select name="amt_gubun" id ="amt_gubun" class="select01 w70" style="width:150px;"> <% for (int i = 0; i < dt.Rows.Count; i++) { strValue = dt.Rows[i]["Code"].ToString(); strSelected = " "; if (strValue == amt_gubun) { strSelected = " selected "; } %> <option value="<%=dt.Rows[i]["Code"].ToString()%>" <%=strSelected %>><%=dt.Rows[i]["Value"].ToString()%></option> <% } %> </select>   <% cssClassName = "style=\"display:none\""; if (amt_gubun == "1200") { cssClassName = ""; } %> <span id="span_amt" <%=cssClassName%>> 희망가격 : <input name="amt" id="amt" value="<%=amt%>" class="input" onkeyup="checkNo(this,'');" style="width:100px; border:1px #CCC solid; padding:3px 2px 1px 5px;;" type="text" maxlength="25" value="">  희망가격 입력 안하시면 유료로만 표시됩니다. </span> </td> </tr>

- jQuery

<script language="javascript" type="text/javascript"> <!-- jQuery.noConflict(); jQuery(document).ready(function () { jQuery('#amt_gubun').change(function () { var code = jQuery('#amt_gubun option:selected').val(); if (code == "1200") { jQuery('#span_amt').show() } else { jQuery('#span_amt').hide() } }); }); //--> </script>