<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
<script>
function fn1(data){
var oUl1 = document.getElementById('ul1');
var html = '';
for(var i=0;i<data.length;i++){
html +='<li>'+data[i]+'</li>';
};
oUl1.innerHTML = html;
}
function fn2(data){
var oUl2 = document.getElementById('ul2');
var html = '';
for(var i=0;i<data.length;i++){
html +='<li>'+data[i]+'</li>';
};
oUl2.innerHTML = html;
}
function fn3(data){
var oUl3 = document.getElementById('ul3');
var html = '';
for(var i=0;i<data.length;i++){
html +='<li>'+data[i]+'</li>';
};
oUl3.innerHTML = html;
}
</script>
<!--<script src="2.txt"></script>-->
<script>
window.onload = function(){
var oBtn1 = document.getElementById('btn1');
var oBtn2 = document.getElementById('btn2');
var oBtn3 = document.getElementById('btn3');
oBtn1.onclick = function(){
//当按钮点击的时候再去加载远程资源，让他执行。
var oScript = document.createElement('script');
oScript.src = 'getData.php?callback=fn1';
document.body.appendChild(oScript);
};
oBtn2.onclick = function(){
//当按钮点击的时候再去加载远程资源，让他执行。
var oScript = document.createElement('script');
oScript.src = 'getData.php?t=str&callback=fn2';
document.body.appendChild(oScript);
};
oBtn3.onclick = function(){
//当按钮点击的时候再去加载远程资源，让他执行。
var oScript = document.createElement('script');
oScript.src = 'getData.php?callback=fn3';
document.body.appendChild(oScript);
};
};
</script>
</head>
<body>
<input type="button" id="btn1" value="加载数字" />
<ul id="ul1"></ul>
<input type="button" id="btn2" value="加载字母" />
<ul id="ul2"></ul>
<input type="button" id="btn3" value="加载字母" />
<ul id="ul3"></ul>
</body>
</html><?php
$t = isset($_GET['t']) ? $_GET['t'] : 'num';
$callback = isset($_GET['callback']) ? $_GET['callback'] : 'fn1';
$arr1 = array('111111','22222222','33333333','4444444','555555555555555555555');
$arr2 = array('aaaaaaaaaaaa','bbbbbbbb','cccccccccccc','ddddddddd','eeeeeeeeeeee');
if ($t == 'num') {
$data = json_encode($arr1);
} else {
$data = json_encode($arr2);
}
echo $callback.'('.$data.');';当点击的时候执行对应的回调fn，后台是怎样找到是对应的数组的？
还有
$t = isset($_GET['t']) ? $_GET['t'] : 'num';
这个$_GET['t']是指哪一个？
super_mb