我有
的index.PHP
<select id="year_list" name="year_list" onchange="check_year_event('year_list','event_list');" > . . . </select>
<select id="event_list" name="event_list" onchange="check_year_event('year_list','event_list');" > . . . </select>
.
.
.
<?PHP
function checkYearandEvent($year,$event) {
$year_event = MysqL_query("SELECT * FROM year_event WHERE year = '$event' AND event = '$event'")
if (MysqL_num_rows($year_event) > 0) {
// do this
}
}
?>
myscripts.js
function check_year_event(year_id,event_id) {
var year = document.getElementById(year_id).value;
var event = document.getElementById(event_id).value;
// call PHP function (but I don't know how): checkYearandEvent(year,event);
}
解决方法
你需要使用ajax.有一个基本的例子：
myscripts.js
function AjaxCaller(){
var xmlhttp=false;
try{
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
}catch(e){
try{
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}catch(E){
xmlhttp = false;
}
}
if(!xmlhttp && typeof XMLHttpRequest!='undefined'){
xmlhttp = new XMLHttpRequest();
}
return xmlhttp;
}
function callPage(url,div){
ajax=AjaxCaller();
ajax.open("GET",url,true);
ajax.onreadystatechange=function(){
if(ajax.readyState==4){
if(ajax.status==200){
div.innerHTML = ajax.responseText;
}
}
}
ajax.send(null);
}
function check_year_event(year_id,event_id) {
var year = document.getElementById(year_id).value;
var event = document.getElementById(event_id).value;
callPage('file.PHP?year='+year+'&'+'event=+'+event,document.getElementById(targetId));
}
file.PHP
<?PHP function checkYearandEvent($year,$event) { $year_event = MysqL_query("SELECT * FROM year_event WHERE year = '$event' AND event = '$event'") if (MysqL_num_rows($year_event) > 0) { // do this } } echo checkYearandEvent($_GET['year'],$_GET['event']); ?>
