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根據選擇不同的下拉值出現相對應的文本輸入框

2019-11-20 22:28:48

字體：大中小

來源：轉載

供稿：網友

復制代碼代碼如下:

 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">; 
<html xmlns="http://www.w3.org/1999/xhtml">; 
<head> 
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 
<%@taglib prefix="s" uri="/struts-tags"%> 
<title>無標題文檔</title> 
<script language="javascript"> 
function $(obj){return document.getElementById(obj);} 
function show(objid) {$(objid).style.display='inline';} 
function hidden(objid) {$(objid).style.display='none';} 
function doit(){ 
var sel_val=$('sel').value; 
if (sel_val=='') {hidden('a1');hidden('a2');} 
if (sel_val==0) {hidden('a1');hidden('a2');} 
if (sel_val==1) {show('a1');hidden('a2');} 
if (sel_val==2) {show('a2');hidden('a1');} 
} 
</script> 
</head> 

<body> 
<select name="sel" id="sel" onchange="javascript:doit();"> 
<option selected="selected">請選擇</option> 
<option value="0">不要輸入框</option> 
<option value="1">輸入框1</option> 
<option value="2">輸入框2</option> 
</select> 

<input value="輸入框1" type="text" name="a1" id="a1" style="display:none;" /> 
<input value="輸入框2" type="text" name="a2" id="a2" style="display:none;" /> 
<br /> 
<br /> 
</body> 
</html> 