js代码function showHint()
{
submt();
var xmlHttp;
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlHttp=new XMLHttpRequest();
} else {// code for IE6, IE5
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
var text = "测试!" ;
//var text1=document.getElementById('addtext').innerHTML;
var url = "addart.php" ;xmlHttp.open("post",url,true);
xmlHttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlHttp.send(text);
xmlHttp.onreadystatechange=changecontent;
}function changecontent(){
if (4==xmlHttp.readyState){
if (200==xmlHttp.status){
alert(xmlHttp.responseText) ;
document.getElementById('addtext').innerHTML=xmlHttp.responseText;
}else{
alert("发生错误!");
}
}
}php代码$response = $_REQUEST["text"];
echo $response ;为什么responseText没有值呢?
{
submt();
var xmlHttp;
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlHttp=new XMLHttpRequest();
} else {// code for IE6, IE5
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
var text = "测试!" ;
//var text1=document.getElementById('addtext').innerHTML;
var url = "addart.php" ;xmlHttp.open("post",url,true);
xmlHttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlHttp.send(text);
xmlHttp.onreadystatechange=changecontent;
}function changecontent(){
if (4==xmlHttp.readyState){
if (200==xmlHttp.status){
alert(xmlHttp.responseText) ;
document.getElementById('addtext').innerHTML=xmlHttp.responseText;
}else{
alert("发生错误!");
}
}
}php代码$response = $_REQUEST["text"];
echo $response ;为什么responseText没有值呢?
var Request=new UrlSearch(); //实例化
var sgn = Request.act;
if( sgn !="ace"){
alert("请登录后评论!");
document.login.uname.focus();
return false;
} else { //
if (document.getElementById('area').value== ""){
alert("您的评论不能为空!");
document.message.area.focus();
return false;
};
}
}
是怎么调用的?
<form method="post" name="message" >
<table align="center" class="nobrd">
<tr>
<td width="660" colspan="6" align="center" class='brd'><textarea name="area" id="area" style="border:1px dashed #966; height:60px; width:640px; text-align:left; overflow-y:auto"></textarea></td>
</tr>
</table>
<table width="100%" border="0" cellspacing="0" cellpadding="0" class="nobrd" >
<tr>
<td> <input type="button" value="提交" onClick="return showHint()"/></td>
</tr>
</table>
</form>
问题是我把xmlHttp改为全局变量后,alert出来的是空对话框
应该是key=value的形式
function showHint(){
//submt();//先注释了
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlHttp=new XMLHttpRequest();
} else {// code for IE6, IE5
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
var text = "text=" + encodeURI("测试!");
//var text1=document.getElementById('addtext').innerHTML;
var url = "test.php" ;xmlHttp.open("post",url,true);
xmlHttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlHttp.send(text);
xmlHttp.onreadystatechange=changecontent;
}
showHint();//因为测试,我就在这里调用了
function changecontent(){alert(1);
if (4==xmlHttp.readyState){
if (200==xmlHttp.status){
alert(xmlHttp.responseText) ;
document.getElementById('addtext').innerHTML=xmlHttp.responseText;
}else{
alert("发生错误!");
}
}
}
submt();
var xmlHttp;
if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
xmlHttp=new XMLHttpRequest();
} else {// code for IE6, IE5
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}
var text = "text=测试!" ;
var text1=document.getElementById('addtext').innerHTML;
var url = "addart.php" ; xmlHttp.open("post",url,true);
xmlHttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlHttp.send(text);
xmlHttp.onreadystatechange = function(){
if (4==xmlHttp.readyState){
if (200==xmlHttp.status){
alert(xmlHttp.responseText) ;
document.getElementById('addtext').innerHTML=xmlHttp.responseText;
}else{
alert("发生错误!");
}
}
}
}