下面的代碼嘗試通過在服務器上連接到PHP的Ajax調用並檢索數據來更改Select選項標記。但是,如果我要將響應文本設置爲span標記,但它不適用於Select選項標記,則下面的代碼工作正常嗎?選擇選項標記不會使用ajax/php調用更改?
<?php
$q = intval($_GET['q']);
$con=mysqli_connect("localhost","rot","ro","abc","3306");
/
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$result = mysqli_query($con,"SELECT DISTINCT(UniqueBusId) FROM cfv_busstopnames WHERE busnumber = ".$q." ");
if (!$result) {
printf("Error: %s\n", mysqli_error($con));
exit();
}
while($row = mysqli_fetch_array($result))
{
echo "<option>" . $row['UniqueBusId'] . "</option>" ;
}
mysqli_close($con);
?>
。取而代之的
xmlhttp.onreadystatechange=function(){
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("select-choice-direction").innerHTML=xmlhttp.responseText;
}
}
<script>
function showUser(str)
{
if (str=="")
{
document.getElementById("txtHint").innerHTML="";
return;
}
if (window.XMLHttpRequest)
{// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{// code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
document.getElementById("select-choice-direction").innerHTML=xmlhttp.responseText;
}
}
xmlhttp.open("GET","getdirection.php?q="+str.value,true);
xmlhttp.send();
}
</script>
<Body>
<label for="select-choice-direction">Direction</label>
<select name="select-choice-direction" id="select-choice-direction" data-native-menu="false" ">
<option> Direction heading towards?</option>
<option value="X">X</option>
<option value="Y">Y</option>
<!-- etc. -->
</select>
</Body>
你爲什麼要給jQuery加標籤?你如何觸發你的功能? – putvande