我有一个基于PHP的表单。它有一个下拉列表,从mysql数据库中获取值。
<select name=cat onchange="AjaxFunction(this.value);" style="width=600"> <br>
<option value='' Select One</option>
<br>
<?
require "config.php";// connection to database
$q=mysql_query("select cat_id from categories");
while($n=mysql_fetch_array($q)){
echo "<option value=$n[cat_id]>$n[category]</option>";
}
?>
</select>
下拉列表可以100%运行。然后我有另一个文本输入字段,
<input type=text name=copycat>
我希望copycat输入框的值等于下拉列表的选定值并实时更新。
可以这样做吗?我应该很容易想象。我想的是:
<input type=text name=copycat onBlur="document.getElementById('cat').value=this.value;">
任何帮助都将不胜感激。
谢谢和问候, 莱恩
更新
让javscript sendValue使用copycat值的代码。
catalin87,请协助让sendvalue正常工作,目前,点击选择按钮没有来自浏览器的响应。
再次感谢, 莱恩
<?
$con = mysql_connect('localhost', 'username', 'password');
if (!$con)
{
die('Could not connect to server: ' . mysql_error());
}
$db=mysql_select_db("database", $con);
if (!$db)
{
die('Could not connect to DB: ' . mysql_error());
}
$sql="select packcode,category,description,grouping,packconfig,sellingunits,eottpoints from skudata order by category, packcode";
$result=mysql_query($sql);
?>
<script type="text/javascript">
function AjaxFunction(cat_id) {
var httpxml;
try {
// Firefox, Opera 8.0+, Safari
httpxml = new XMLHttpRequest();
} catch (e) {
// Internet Explorer
try {
httpxml = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
httpxml = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
alert("Your browser does not support AJAX!");
return false;
}
}
}
function stateck() {
if (httpxml.readyState == 4) {
var myarray = eval(httpxml.responseText);
// Before adding new we must remove previously loaded elements
for (j = document.testform.subcat.options.length - 1; j >= 0; j--) {
document.testform.subcat.remove(j);
}
for (i = 0; i < myarray.length; i++) {
var optn = document.createElement("OPTION");
optn.text = myarray[i];
optn.value = myarray[i];
document.testform.subcat.options.add(optn);
}
}
}
var url="dd.php";
url = url+"?cat_id="+cat_id;
url = url+"&sid="+Math.random();
httpxml.onreadystatechange = stateck;
httpxml.open("GET",url,true);
httpxml.send(null);
}
</script>
<script type="text/javascript">
function updateinput(){
var e = document.getElementById("subcat");
var catSelected = e.options[e.selectedIndex].value;
document.getElementById("copycat").value=catSelected;
}
</script>
<script type="text/javascript">
function sendValue(value)
{
value = e.options[e.selectedIndex].value;
var parentId = <?php echo json_encode($_GET['id']); ?>;
window.opener.updateValue(parentId, value);
window.close();
}
</script>
<form name="testform">
Category: <select name=cat id=cat onchange="AjaxFunction(this.value);" style="width=600"> <br>
<option value='' style="width=600">Select One</option>
<br>
<?
require "config.php";// connection to database
$q=mysql_query("select * from categories");
while($n=mysql_fetch_array($q)){
echo "<option value=$n[cat_id]>$n[category]</option>";
}
?>
</select>
<br><br>
Pack Code:
<select name=subcat onchange="updateinput();" >
<br><br>
</select>
<br><br>
<input type=text name=copycat id=copycat >
<br><br>
<td><input type=button value="Select" onClick="sendValue(document.getElementById(copycat))" /></td>
</form>
答案 0 :(得分:2)
1`st为选择框和输入设置一个id,并添加一个onChange事件:
<select name=cat id=cat onchange="updateinput();" style="width=600">
<input type=text name=copycat id=copycat >
然后将此功能放在某处:
<script type="text/javascript">
function updateinput(){
var e = document.getElementById("cat");
var catSelected = e.options[e.selectedIndex].text;
document.getElementById("copycat").value=catSelected;
}
</script>
这将填充所选项目的标签,如果您想要所选项目的值使用此功能:
<script type="text/javascript">
function updateinput(){
var e = document.getElementById("cat");
var catSelected = e.options[e.selectedIndex].value;
document.getElementById("copycat").value=catSelected;
}
</script>
这是您的完整代码:
<?
$con = mysql_connect('localhost', 'username', 'password');
if (!$con)
{
die('Could not connect to server: ' . mysql_error());
}
$db=mysql_select_db("dbname", $con);
if (!$db)
{
die('Could not connect to DB: ' . mysql_error());
}
$sql="select packcode,category,description,grouping,packconfig,sellingunits,eottpoints from skudata order by category, packcode";
$result=mysql_query($sql);
?>
<script type="text/javascript">
function AjaxFunction(cat_id) {
var httpxml;
try {
// Firefox, Opera 8.0+, Safari
httpxml = new XMLHttpRequest();
} catch (e) {
// Internet Explorer
try {
httpxml = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
httpxml = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
alert("Your browser does not support AJAX!");
return false;
}
}
}
function stateck() {
if (httpxml.readyState == 4) {
var myarray = eval(httpxml.responseText);
// Before adding new we must remove previously loaded elements
for (j = document.testform.subcat.options.length - 1; j >= 0; j--) {
document.testform.subcat.remove(j);
}
for (i = 0; i < myarray.length; i++) {
var optn = document.createElement("OPTION");
optn.text = myarray[i];
optn.value = myarray[i];
document.testform.subcat.options.add(optn);
}
}
}
var url="dd.php";
url = url+"?cat_id="+cat_id;
url = url+"&sid="+Math.random();
httpxml.onreadystatechange = stateck;
httpxml.open("GET",url,true);
httpxml.send(null);
}
</script>
<script type="text/javascript">
function sendValue(value)
{
var parentId = <?php echo json_encode($_GET['id']); ?>;
window.opener.updateValue(parentId, value);
window.close();
}
</script>
<script type="text/javascript">
function updateinput(){
var e = document.getElementById("cat");
var catSelected = e.options[e.selectedIndex].value;
document.getElementById("copycat").value=catSelected;
}
</script>
<form name="testform">
Category: <select name=cat id=cat onchange="updateinput();" style="width=600"> <br>
<option value='' style="width=600">Select One</option>
<br>
<?
require "config.php";// connection to database
$q=mysql_query("select * from categories");
while($n=mysql_fetch_array($q)){
echo "<option value=$n[cat_id]>$n[category]</option>";
}
?>
</select>
<br><br>
Pack Code:
<select name=subcat >
<br><br>
</select>
<br><br>
<input type=text name=copycat id=copycat >
<br><br>
<td><input type=button value="Select" onClick="sendValue('<?php echo $rows['packcode']; ?>')" /></td>
</form>
我改变了:
Put:onchange =“updateinput();”
<select name=cat id=cat onchange="updateinput();" style="width=600">
和
<input type=text name=copycat id=copycat >
删除:
onBlur="document.getElementById('cat').value=this.value;"
答案 1 :(得分:1)
您应该将id="cat"
添加到:
<select name="cat" id="cat" onchange="AjaxFunction(this.value);" style="width=600">
和
echo "<option value='".$n['cat_id']."'>".$n['category']."</option>";