$("button").click(function(){
 $.get("demo_ajax_load.txt", function(result){
 $("div").html(result);
 });
});

$(selector).get(url,data,success(response,status,xhr),dataType)

$.ajax({
 url: url,
 data: data,
 success: success,
 dataType: dataType
});

$.get("test.php", { name: "John", time: "2pm" } );

$.get("test.php", function(data){
 alert("Data Loaded: " + data);
});

$.get("test.cgi", { name: "John", time: "2pm" },
 function(data){
 alert("Data Loaded: " + data);
 });

$(document).ready(function(){
 $("form").submit(function(event) {event.preventDefault()})//取消submit的默认行为
 $("form input[type='submit']").click(function(){
 var url = $('form').attr('action'); // 取Form中要提交的链接
 var param = {}; // 组装发送参数
 param['name'] = $('form input[name=name]').val();
 param['age'] = $('form input[name=age]').val();
 $.get(url, param, function(dom) { $('div.get').append(dom) }) ; // 发送并显示返回内容
 });
})

<form action="ajax.php" method="get">
Name: <input type="text" name="name" />
Age: <input type="text" name="age" />
<input type="submit" />
</form>
<div class="get">这是ajax的get方法</div>

error_reporting(0);
 if($_GET["name"]=="kitty")
{
 $name= "you are the lucky";
}
else
$name=$_GET["name"];
$age=$_GET["age"];
echo "<div> ".$name." ".$age."</div>";